diff --git a/routes/service/FpService.js b/routes/service/FpService.js
index 9bb85f7..35b60bf 100644
--- a/routes/service/FpService.js
+++ b/routes/service/FpService.js
@@ -58,7 +58,10 @@ class FpService {
 
         let fpCrypt = new FpCrypt(loginCookieStr);
         let handleParam = fpCrypt.handleParam(param, urlPath);
-        var enParam = JSON.stringify({'Jmbw': handleParam["enVal"]});
+        var enParam = ""
+        if (handleParam["enVal"]){
+            enParam = JSON.stringify({'Jmbw': handleParam["enVal"]});
+        }
         let handleSuffix = fpCrypt.handleSuffix(urlPath);
 
         let los = window[window["_d_ts"]](handleSuffix, enParam);