diff --git a/app/admin/controller/Config.php b/app/admin/controller/Config.php
index a14bce0..74250a5 100755
--- a/app/admin/controller/Config.php
+++ b/app/admin/controller/Config.php
@@ -31,6 +31,7 @@ class Config extends Base
                             'name' => '默认商户',
                             'mch_id' => $old_config['mch_id'] ?? '',
                             'keys' => $old_config['keys'] ?? '',
+                            'order_prefix' => $old_config['order_prefix'] ?? 'MYH',
                             'weight' => 1
                         ]
                     ]
@@ -92,6 +93,23 @@ class Config extends Base
         $data = input("post.");
         $data['update_time'] = time();
         
+        // 处理微信支付商户前缀验证
+        if ($data['key'] == 'weixinpay_setting' && isset($data['merchants']) && is_array($data['merchants'])) {
+            // 检查前缀的唯一性
+            $prefixes = [];
+            foreach ($data['merchants'] as $index => $merchant) {
+                if (empty($merchant['order_prefix']) || strlen($merchant['order_prefix']) !== 3) {
+                    return $this->renderError('商户前缀必须是3位字符');
+                }
+                
+                if (in_array($merchant['order_prefix'], $prefixes)) {
+                    return $this->renderError('商户前缀"'.$merchant['order_prefix'].'"重复，每个商户的前缀必须唯一');
+                }
+                
+                $prefixes[] = $merchant['order_prefix'];
+            }
+        }
+        
         // 处理同步地址数据格式
         if ($data['key'] == 'systemconfig') {
             $syncAddresses = [];
diff --git a/app/admin/view/Config/systemconfig.html b/app/admin/view/Config/systemconfig.html
index 30c63a2..b0f7cc3 100755
--- a/app/admin/view/Config/systemconfig.html
+++ b/app/admin/view/Config/systemconfig.html
@@ -4,60 +4,7 @@
     <h2 style="text-align: center;margin-top: 20px;">系统设置</h2>
     <div class="layui-fluid">
         <div class="layui-row layui-col-space15">
-            <div class="layui-col-md12">
-                <div class="layui-card">
-                    <div class="layui-card-header">盒子同步地址</div>
-                    <div class="layui-card-body">
-                        <form class="layui-form" action="" lay-filter="component-form-element">
-                            <input type="hidden" name="key" value="{$key}">
-                            <div class="layui-form-item">
-                                <label class="layui-form-label">盒子同步地址</label>
-                                <div class="layui-input-block">
-                                    <div id="sync-addresses">
-                                        {if isset($data.sync_address) && is_array($data.sync_address)}
-                                        {foreach $data.sync_address as $index => $address}
-                                        <div class="sync-address-item">
-                                            <div class="layui-input-inline" style="width: 200px; margin-right: 10px;">
-                                                <input type="text" name="sync_address_names[]"
-                                                    value="{$address.name|default=''}" autocomplete="off"
-                                                    class="layui-input" placeholder="地址名称">
-                                            </div>
-                                            <div class="layui-input-inline" style="width: 450px; margin-right: 10px;">
-                                                <input type="text" name="sync_address_urls[]"
-                                                    value="{$address.sync_address|default=''}" autocomplete="off"
-                                                    class="layui-input" placeholder="请输入同步地址URL">
-                                            </div>
-                                            <button type="button"
-                                                class="layui-btn layui-btn-danger remove-address">删除</button>
-                                        </div>
-                                        {/foreach}
-                                        {else}
-                                        <div class="sync-address-item">
-                                            <div class="layui-input-inline" style="width: 200px; margin-right: 10px;">
-                                                <input type="text" name="sync_address_names[]" value=""
-                                                    autocomplete="off" class="layui-input" placeholder="地址名称">
-                                            </div>
-                                            <div class="layui-input-inline" style="width: 450px; margin-right: 10px;">
-                                                <input type="text" name="sync_address_urls[]" value=""
-                                                    autocomplete="off" class="layui-input" placeholder="请输入同步地址URL">
-                                            </div>
-                                            <button type="button"
-                                                class="layui-btn layui-btn-danger remove-address">删除</button>
-                                        </div>
-                                        {/if}
-                                    </div>
-                                    <div style="margin-top: 10px;">
-                                        <button type="button" class="layui-btn layui-btn-normal"
-                                            id="add-address">添加地址</button>
-                                        <button class="layui-btn" lay-submit
-                                            lay-filter="component-form-element">保存</button>
-                                    </div>
-                                </div>
-                            </div>
-                        </form>
-                    </div>
-                </div>
-            </div>
+        
 
             <div class="layui-col-md12">
                 <div class="layui-card">
@@ -126,6 +73,61 @@
                 </div>
             </div>
 
+            <div class="layui-col-md12">
+                <div class="layui-card">
+                    <div class="layui-card-header">盒子同步地址</div>
+                    <div class="layui-card-body">
+                        <form class="layui-form" action="" lay-filter="component-form-element">
+                            <input type="hidden" name="key" value="{$key}">
+                            <div class="layui-form-item">
+                                <label class="layui-form-label">盒子同步地址</label>
+                                <div class="layui-input-block">
+                                    <div id="sync-addresses">
+                                        {if isset($data.sync_address) && is_array($data.sync_address)}
+                                        {foreach $data.sync_address as $index => $address}
+                                        <div class="sync-address-item">
+                                            <div class="layui-input-inline" style="width: 200px; margin-right: 10px;">
+                                                <input type="text" name="sync_address_names[]"
+                                                    value="{$address.name|default=''}" autocomplete="off"
+                                                    class="layui-input" placeholder="地址名称">
+                                            </div>
+                                            <div class="layui-input-inline" style="width: 450px; margin-right: 10px;">
+                                                <input type="text" name="sync_address_urls[]"
+                                                    value="{$address.sync_address|default=''}" autocomplete="off"
+                                                    class="layui-input" placeholder="请输入同步地址URL">
+                                            </div>
+                                            <button type="button"
+                                                class="layui-btn layui-btn-danger remove-address">删除</button>
+                                        </div>
+                                        {/foreach}
+                                        {else}
+                                        <div class="sync-address-item">
+                                            <div class="layui-input-inline" style="width: 200px; margin-right: 10px;">
+                                                <input type="text" name="sync_address_names[]" value=""
+                                                    autocomplete="off" class="layui-input" placeholder="地址名称">
+                                            </div>
+                                            <div class="layui-input-inline" style="width: 450px; margin-right: 10px;">
+                                                <input type="text" name="sync_address_urls[]" value=""
+                                                    autocomplete="off" class="layui-input" placeholder="请输入同步地址URL">
+                                            </div>
+                                            <button type="button"
+                                                class="layui-btn layui-btn-danger remove-address">删除</button>
+                                        </div>
+                                        {/if}
+                                    </div>
+                                    <div style="margin-top: 10px;">
+                                        <button type="button" class="layui-btn layui-btn-normal"
+                                            id="add-address">添加地址</button>
+                                        <button class="layui-btn" lay-submit
+                                            lay-filter="component-form-element">保存</button>
+                                    </div>
+                                </div>
+                            </div>
+                        </form>
+                    </div>
+                </div>
+            </div>
+            
             <div class="layui-col-md12">
                 <div class="layui-card">
                     <div class="layui-card-header">微信公众号设置</div>
diff --git a/app/admin/view/Config/weixinpay.html b/app/admin/view/Config/weixinpay.html
index c3b109e..cc23fb8 100755
--- a/app/admin/view/Config/weixinpay.html
+++ b/app/admin/view/Config/weixinpay.html
@@ -14,7 +14,7 @@
                         <div class="layui-form" wid100 lay-filter="">
                             <div class="layui-form-item">
                                 <div class="layui-alert layui-bg-gray">
-                                    <i class="layui-icon layui-icon-tips"></i> 微信Appid和AppSecret已移至系统设置页面，请在那里设置
+                                    <i class="layui-icon layui-icon-tips"></i> 微信Appid和AppSecret已移至系统设置页面，请在那里设置。ps:权重越高，支付几率越多。订单前缀必填，用于区分哪一个商户号支付的。
                                 </div>
                             </div>
                             <input type="hidden" name="key" value="weixinpay_setting" lay-verify="required" class="layui-input">
@@ -41,6 +41,12 @@
                                             <input type="text" name="merchants[{$index}][keys]" value="{$merchant.keys}" lay-verify="required" class="layui-input" placeholder="请输入商户密钥">
                                         </div>
                                     </div>
+                                    <div class="layui-form-item">
+                                        <label class="layui-form-label">订单前缀</label>
+                                        <div class="layui-input-inline ggg">
+                                            <input type="text" name="merchants[{$index}][order_prefix]" value="{$merchant.order_prefix}" lay-verify="required|prefix" class="layui-input" placeholder="请输入3位订单前缀" maxlength="3">
+                                        </div>
+                                    </div>
                                     <div class="layui-form-item">
                                         <label class="layui-form-label">权重</label>
                                         <div class="layui-input-inline ggg">
@@ -71,6 +77,12 @@
                                             <input type="text" name="merchants[0][keys]" value="{$data.keys}" lay-verify="required" class="layui-input" placeholder="请输入商户密钥">
                                         </div>
                                     </div>
+                                    <div class="layui-form-item">
+                                        <label class="layui-form-label">订单前缀</label>
+                                        <div class="layui-input-inline ggg">
+                                            <input type="text" name="merchants[0][order_prefix]" value="{$data.order_prefix|default='MYH'}" lay-verify="required|prefix" class="layui-input" placeholder="请输入3位订单前缀" maxlength="3">
+                                        </div>
+                                    </div>
                                     <div class="layui-form-item">
                                         <label class="layui-form-label">权重</label>
                                         <div class="layui-input-inline ggg">
@@ -101,6 +113,56 @@
 <script type="text/javascript">
     layui.use(['layer','form','upload','element'], function(){
         var $ = layui.$;
+        var form = layui.form;
+        
+        // 添加自定义验证规则
+        form.verify({
+            prefix: function(value, item){
+                if(value.length !== 3){
+                    return '订单前缀必须是3位字符';
+                }
+                
+                // 检查前缀唯一性
+                var prefixes = [];
+                $('input[name$="[order_prefix]"]').each(function() {
+                    var prefix = $(this).val();
+                    if (prefix && prefix !== value) {
+                        prefixes.push(prefix);
+                    }
+                });
+                
+                if (prefixes.includes(value)) {
+                    return '商户前缀"' + value + '"重复，每个商户的前缀必须唯一';
+                }
+            }
+        });
+        
+        // 监听提交
+        form.on('submit', function(data){
+            // 验证前缀唯一性
+            var prefixes = [];
+            var hasDuplicate = false;
+            var duplicatePrefix = '';
+            
+            $('input[name$="[order_prefix]"]').each(function() {
+                var prefix = $(this).val();
+                if (prefix) {
+                    if (prefixes.includes(prefix)) {
+                        hasDuplicate = true;
+                        duplicatePrefix = prefix;
+                        return false; // 跳出循环
+                    }
+                    prefixes.push(prefix);
+                }
+            });
+            
+            if (hasDuplicate) {
+                layer.msg('商户前缀"' + duplicatePrefix + '"重复，每个商户的前缀必须唯一', {icon: 2, anim: 6, time: 2000});
+                return false;
+            }
+            
+            return true;
+        });
         
         // 添加商户按钮点击事件
         $('#add-merchant').on('click', function() {
@@ -125,6 +187,12 @@
                             <input type="text" name="merchants[${index}][keys]" value="" lay-verify="required" class="layui-input" placeholder="请输入商户密钥">
                         </div>
                     </div>
+                    <div class="layui-form-item">
+                        <label class="layui-form-label">订单前缀</label>
+                        <div class="layui-input-inline ggg">
+                            <input type="text" name="merchants[${index}][order_prefix]" value="" lay-verify="required|prefix" class="layui-input" placeholder="请输入3位订单前缀" maxlength="3">
+                        </div>
+                    </div>
                     <div class="layui-form-item">
                         <label class="layui-form-label">权重</label>
                         <div class="layui-input-inline ggg">
@@ -135,6 +203,7 @@
                 </div>
             `;
             $('#merchants-container').append(newItemHtml);
+            form.render();
         });
         
         // 删除商户按钮点击事件(使用事件委托)
@@ -157,8 +226,48 @@
     });
 
     function check(){
-        var url="{:url('/admin/update')}";
         var $ = layui.$;
+        var form = layui.form;
+        
+        // 先进行前缀唯一性验证
+        var prefixes = [];
+        var hasDuplicate = false;
+        var duplicatePrefix = '';
+        
+        $('input[name$="[order_prefix]"]').each(function() {
+            var prefix = $(this).val();
+            if (prefix) {
+                if (prefixes.includes(prefix)) {
+                    hasDuplicate = true;
+                    duplicatePrefix = prefix;
+                    return false; // 跳出循环
+                }
+                prefixes.push(prefix);
+            }
+        });
+        
+        if (hasDuplicate) {
+            layer.msg('商户前缀"' + duplicatePrefix + '"重复，每个商户的前缀必须唯一', {icon: 2, anim: 6, time: 2000});
+            return false;
+        }
+        
+        // 长度验证
+        var hasError = false;
+        $('input[name$="[order_prefix]"]').each(function() {
+            var prefix = $(this).val();
+            if (!prefix || prefix.length !== 3) {
+                hasError = true;
+                layer.msg('商户前缀必须是3位字符', {icon: 2, anim: 6, time: 2000});
+                return false; // 跳出循环
+            }
+        });
+        
+        if (hasError) {
+            return false;
+        }
+        
+        // 提交表单
+        var url="{:url('/admin/update')}";
         var load=layer.load(2);
         $.post(url,$("form").serialize(),function(data){
             if(data.status==1){
diff --git a/app/api/controller/Pay.php b/app/api/controller/Pay.php
index f833770..767ae47 100755
--- a/app/api/controller/Pay.php
+++ b/app/api/controller/Pay.php
@@ -38,7 +38,7 @@ class Pay extends Base
             $this->merchant = $config['mch_id'];
             $this->secretKey = $config['keys'];
         } else {
-            // 小程序使用随机商户
+            // 初始使用默认配置，具体支付时会根据订单号重新获取商户信息
             $wxpayConfig = WxPayHelper::getWxPayConfig();
             if (!empty($wxpayConfig['merchant'])) {
                 $this->appid = $wxpayConfig['appid'];
@@ -61,6 +61,35 @@ class Pay extends Base
         $this->noticeurl = request()->domain() . '/api/notify/order_notify';#订单回调URL
     }
 
+    /**
+     * 根据订单号设置正确的商户配置
+     * 确保创建订单和支付使用的是同一个商户
+     * 
+     * @param string $order_num 订单号
+     * @return bool 是否成功设置商户信息
+     */
+    protected function setMerchantByOrderNum($order_num)
+    {
+        if (!$this->ish5() && strpos($order_num, 'MH_') === 0) {
+            // 提取订单中的商户前缀
+            $merchant_prefix = WxPayHelper::extractOrderPrefix($order_num);
+            
+            if (!empty($merchant_prefix)) {
+                // 根据前缀获取固定的商户配置
+                $wxpayConfig = WxPayHelper::getFixedWxPayConfig($merchant_prefix);
+                
+                if (!empty($wxpayConfig['merchant'])) {
+                    // 更新当前实例的商户信息
+                    $this->appid = $wxpayConfig['appid'];
+                    $this->merchant = $wxpayConfig['merchant']['mch_id'];
+                    $this->secretKey = $wxpayConfig['merchant']['keys'];
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
     //支付
     /**
      * [pay description]
@@ -162,6 +191,9 @@ class Pay extends Base
     //支付
     public function wxpay($order_num, $money, $title, $openid, $notify)
     {
+        // 根据订单号设置正确的商户配置
+        $this->setMerchantByOrderNum($order_num);
+        
         $openidx = $openid;
         if ($this->ish5()) {
             $user = User::getInfo(['openid' => $openidx]);
@@ -233,6 +265,9 @@ class Pay extends Base
      */
     public function wxCreateOrder($order_no, $price, $openid, $body, $attach)
     {
+        // 根据订单号设置正确的商户配置
+        $this->setMerchantByOrderNum($order_no);
+        
         $openidx = $openid;
         if ($this->ish5()) {
             $user = User::getInfo(['openid' => $openidx]);
diff --git a/app/common.php b/app/common.php
index c6d5303..b6b4551 100755
--- a/app/common.php
+++ b/app/common.php
@@ -263,14 +263,30 @@ if (!function_exists('arraySequence')) {
 if (!function_exists('create_order_no')) {
     /**
      * 生成订单号
+     * @param string $pre 订单前缀
+     * @param string $tale 表名
+     * @param string $field 字段名
      * @return string
      */
     function create_order_no($pre = 'NO_', $tale = 'order', $field = 'order_num')
     {
-        $order_no = $pre . date('Ymd') . substr(implode(NULL, array_map('ord', str_split(substr(uniqid(), 7, 13), 1))), 0, 8) . str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT);
+        // 检查是否包含多商户前缀标记，处理商户随机选择并获取前缀
+        if (strpos($pre, 'MH_') !== false) {
+            // 引入微信支付帮助类
+            $wxpayConfig = \app\common\helper\WxPayHelper::getWxPayConfig();
+            
+            // 如果存在商户信息并且有前缀，则使用商户前缀
+            if (!empty($wxpayConfig['merchant']) && !empty($wxpayConfig['merchant']['order_prefix'])) {
+                $merchant_prefix = $wxpayConfig['merchant']['order_prefix'];
+                // 在MH_后面添加商户前缀，而不是替换MH_
+                $pre = 'MH_' . $merchant_prefix;
+            }
+        }
+        
+        $order_no = $pre . date('Ymd') . substr(implode('', array_map('ord', str_split(substr(uniqid(), 7, 13), 1))), 0, 8) . str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT);
         $r = Db::name($tale)->field('id')->where([$field => $order_no])->find();
         if ($r) {
-            $order_no = create_order_no($pre);
+            $order_no = create_order_no($pre, $tale, $field);
         }
         return $order_no;
     }
@@ -622,9 +638,8 @@ if (!function_exists('thumbImage')) {
         require_once('../vendor/topthink/think-image/src/Image.php');
         $image = \think\Image::open($path);
         // 按照原图的比例生成一个最大为150*150的缩略图并保存为thumb.png
-        $image->thumb($width, $height)->radius($radius, $bg)->save($path);
+        $image->thumb($width, $height)->save($path);
         return true;
-
     }
 }
 
diff --git a/app/common/helper/WxPayHelper.php b/app/common/helper/WxPayHelper.php
index c62e5c1..82d9c3e 100644
--- a/app/common/helper/WxPayHelper.php
+++ b/app/common/helper/WxPayHelper.php
@@ -67,6 +67,7 @@ class WxPayHelper
                     'name' => '默认商户',
                     'mch_id' => $old_config['mch_id'],
                     'keys' => $old_config['keys'],
+                    'order_prefix' => $old_config['order_prefix'] ?? 'MYH',
                     'weight' => 1
                 ];
             }
@@ -85,4 +86,66 @@ class WxPayHelper
             'appid' => $appid
         ];
     }
+    
+    /**
+     * 获取固定的微信支付配置（基于订单前缀）
+     * 
+     * @param string $order_prefix 订单前缀，如果提供则返回对应前缀的商户信息
+     * @return array 包含固定商户信息和appid
+     */
+    public static function getFixedWxPayConfig($order_prefix = '')
+    {
+        $wechat_setting = getConfig('wechat_setting');
+        $weixinpay_setting = getConfig('weixinpay_setting');
+        
+        // 尝试查找与订单前缀匹配的商户
+        $merchant = null;
+        if (!empty($order_prefix) && !empty($weixinpay_setting) && !empty($weixinpay_setting['merchants'])) {
+            foreach ($weixinpay_setting['merchants'] as $m) {
+                if (!empty($m['order_prefix']) && $m['order_prefix'] === $order_prefix) {
+                    $merchant = $m;
+                    break;
+                }
+            }
+        }
+        
+        // 如果没有找到匹配的商户，则使用随机选择
+        if (empty($merchant)) {
+            return self::getWxPayConfig();
+        }
+        
+        // 获取微信AppID
+        $appid = '';
+        if (!empty($wechat_setting) && !empty($wechat_setting['appid'])) {
+            $appid = $wechat_setting['appid'];
+        } else {
+            $old_config = getConfig('weixinpay');
+            if (!empty($old_config) && !empty($old_config['appid'])) {
+                $appid = $old_config['appid'];
+            }
+        }
+        
+        return [
+            'merchant' => $merchant,
+            'appid' => $appid
+        ];
+    }
+    
+    /**
+     * 从订单号中提取商户前缀
+     * 
+     * @param string $order_no 订单号（格式如 MH_ABC20240529...)
+     * @return string|null 商户前缀，如果无法提取则返回null
+     */
+    public static function extractOrderPrefix($order_no)
+    {
+        if (strpos($order_no, 'MH_') === 0) {
+            // 尝试提取MH_后的3个字符作为商户前缀
+            $prefix = substr($order_no, 3, 3);
+            if (!empty($prefix) && strlen($prefix) === 3) {
+                return $prefix;
+            }
+        }
+        return null;
+    }
 } 
\ No newline at end of file
diff --git a/app/common/server/WechatRefund.php b/app/common/server/WechatRefund.php
index db49f2f..24c6545 100755
--- a/app/common/server/WechatRefund.php
+++ b/app/common/server/WechatRefund.php
@@ -15,8 +15,17 @@ class WechatRefund extends MyController
      */
     public function OrderRefund($info)
     {
-        // 使用WxPayHelper获取随机商户配置
-        $wxpayConfig = WxPayHelper::getWxPayConfig();
+        // 提取订单号中的商户前缀
+        $merchant_prefix = null;
+        if (!empty($info['send_num']) && strpos($info['send_num'], 'MH_') === 0) {
+            $merchant_prefix = WxPayHelper::extractOrderPrefix($info['send_num']);
+        }
+        
+        // 根据订单中的商户前缀获取配置
+        $wxpayConfig = !empty($merchant_prefix) 
+            ? WxPayHelper::getFixedWxPayConfig($merchant_prefix) 
+            : WxPayHelper::getWxPayConfig();
+            
         $appid = $wxpayConfig['appid'];
         $merchant = $wxpayConfig['merchant']['mch_id'];
         
@@ -27,10 +36,10 @@ class WechatRefund extends MyController
         $params['out_refund_no'] = $this->genRandomString(64);
         $params['total_fee'] = round($info['freight'] * 100, 2);
         $params['refund_fee'] = round($info['freight'] * 100, 2);
-        $params['sign'] = $this->MakeSign($params);
+        $params['sign'] = $this->MakeSign($params, $wxpayConfig['merchant']['keys']);
         $xml = $this->data_to_xml($params);
         $url = 'https://api.mch.weixin.qq.com/secapi/pay/refund';
-        $tui_info = $this->postXmlCurl($xml, $url);
+        $tui_info = $this->postXmlCurl($xml, $url, $wxpayConfig['merchant']);
         $result = $this->xml_to_data($tui_info);
         if ($result['return_code'] === 'SUCCESS' && $result['result_code'] === 'SUCCESS') {
             return ['status' => 1, 'msg' => $result];
@@ -43,13 +52,17 @@ class WechatRefund extends MyController
 
     /**
      * 生成签名
-     * @return 签名
+     * @param array $params 签名参数
+     * @param string $secretKey 可选，指定密钥，不指定则通过WxPayHelper获取
+     * @return string 签名
      */
-    public function MakeSign($params)
+    public function MakeSign($params, $secretKey = null)
     {
-        // 使用WxPayHelper获取随机商户配置
-        $wxpayConfig = WxPayHelper::getWxPayConfig();
-        $secretKey = $wxpayConfig['merchant']['keys'];
+        // 如果未提供密钥，则使用WxPayHelper获取随机商户配置
+        if (empty($secretKey)) {
+            $wxpayConfig = WxPayHelper::getWxPayConfig();
+            $secretKey = $wxpayConfig['merchant']['keys'];
+        }
         
         //签名步骤一：按字典序排序数组参数
         ksort($params);
@@ -150,17 +163,19 @@ class WechatRefund extends MyController
      *
      * @param string $xml 需要post的xml数据
      * @param string $url url
-     * @param bool $useCert 是否需要证书，默认不需要
+     * @param array|null $merchant 商户配置，如果不传则获取随机商户
      * @param int $second url执行超时时间，默认30s
      * @throws WxPayException
      */
-    private function postXmlCurl($xml, $url, $second = 30)
+    private function postXmlCurl($xml, $url, $merchant = null, $second = 30)
     {
         $path = app()->getRootPath();
         
-        // 获取商户配置
-        $wxpayConfig = WxPayHelper::getWxPayConfig();
-        $merchant = $wxpayConfig['merchant'];
+        // 如果未指定商户配置，则使用随机商户配置
+        if (empty($merchant)) {
+            $wxpayConfig = WxPayHelper::getWxPayConfig();
+            $merchant = $wxpayConfig['merchant'];
+        }
         
         // 优先使用商户配置中的证书路径，如果未设置则使用默认路径
         $ssl_cert = isset($merchant['ssl_cert']) && !empty($merchant['ssl_cert']) 
diff --git a/config/menu.php b/config/menu.php
index 109b588..ad837b9 100755
--- a/config/menu.php
+++ b/config/menu.php
@@ -24,7 +24,10 @@ return [
                 'url' => '/admin/user_invite',
                 'name' => '用户邀请列表',
             ],
-            
+            [
+                'url' => '/admin/sign',
+                'name' => '用户签到设置',
+            ],
         ],
     ],
     [
@@ -62,7 +65,11 @@ return [
             [
                 'url' => '/admin/goods',
                 'name' => '盒子列表',
-            ]
+            ],
+            [
+                'url' => '/admin/card_shang',
+                'name' => '抽奖等级设置',
+            ],
         ],
     ],
     [
@@ -215,14 +222,8 @@ return [
                 'url' => '/admin/wechatofficialaccount',
                 'name' => '微信公众号',
             ],
-            [
-                'url' => '/admin/sign',
-                'name' => '签到设置',
-            ],
-            [
-                'url' => '/admin/card_shang',
-                'name' => '抽奖等级设置',
-            ],
+           
+
             [
                 'url' => '/admin/systemconfig',
                 'name' => '系统设置',