diff --git a/scripts/wx_upload_to_combine.lua b/scripts/wx_upload_to_combine.lua
index df61c22..4d087dc 100644
--- a/scripts/wx_upload_to_combine.lua
+++ b/scripts/wx_upload_to_combine.lua
@@ -19,8 +19,9 @@ local function read_wx_file()
     ngx.log(ngx.INFO, 'REQ_BODY -> ', ngx.req.get_body_data())
 
     local files = {}
-    for v in pairs(req_body["media_ids"]) do
-        table.insert(files, get_wx_media(v));
+    for i = 1, #req_body["media_ids"] do
+        print("media_id -> ", i, req_body["media_ids"][i])
+        table.insert(files, get_wx_media(req_body["media_ids"][i]));
     end
 
     create_task(files, authHeader, sudoerToken)