diff --git a/pkg/fuiou/client.go b/pkg/fuiou/client.go
index ef2543e..01b24fd 100644
--- a/pkg/fuiou/client.go
+++ b/pkg/fuiou/client.go
@@ -68,6 +68,8 @@ func NewClient(insCd, mchntCd, termId, apiURL, notifyURL, privateKeyBase64, publ
 func (c *Client) Sign(data interface{}) (string, error) {
 	signStr := buildSignString(data)
 
+	c.logger.Debug("富友签名原文", zap.String("sign_str", signStr))
+
 	// UTF-8 → GBK
 	gbkBytes, err := utf8ToGBK([]byte(signStr))
 	if err != nil {
@@ -227,11 +229,6 @@ func structToMap(data interface{}) map[string]string {
 			continue
 		}
 
-		// 排除空值
-		if value == "" {
-			continue
-		}
-
 		result[tag] = value
 	}