diff --git a/extend/weChat/weChatPay.go b/extend/weChat/weChatPay.go
index e67ed6a..e5f6f26 100644
--- a/extend/weChat/weChatPay.go
+++ b/extend/weChat/weChatPay.go
@@ -8,6 +8,7 @@ import (
 	"github.com/wechatpay-apiv3/wechatpay-go/services/refunddomestic"
 	"github.com/wechatpay-apiv3/wechatpay-go/utils"
 	"hospital-admin-api/config"
+	"path/filepath"
 )
 
 type RefundRequest struct {
@@ -35,9 +36,10 @@ func (r RefundRequest) Refund(orderType int) (*refunddomestic.Refund, error) {
 		return nil, errors.New("商户号错误")
 	}
 
-	certsDir := "extend/weChat/certs/" + mchId + "/apiclient_key.pem"
+	// certsDir := "extend/weChat/certs/" + mchId + "/apiclient_key.pem"
 
 	// 使用 utils 提供的函数从本地文件中加载商户私钥，商户私钥会用来生成请求的签名
+	certsDir := filepath.Join("extend/weChat/certs", mchId, "/apiclient_key.pem")
 	// certsDir := filepath.Join("extend/weChat/certs", "/1636644248/apiclient_key.pem")
 	mchPrivateKey, err := utils.LoadPrivateKeyWithPath(certsDir)
 	if err != nil {