diff --git a/scripts/convert_audio.lua b/scripts/convert_audio.lua
index 797ce01..6857cb5 100644
--- a/scripts/convert_audio.lua
+++ b/scripts/convert_audio.lua
@@ -23,21 +23,21 @@ local function convert()
     local file_dir = ngx.var.tmp_file_dir
     ngx.req.read_body()
     local req_body = cjson.decode(ngx.req.get_body_data())
-    ngx.log(ngx.INFO, 'REQ_BODY -> ', ngx.req.get_body_data())
+    ngx.log(ngx.INFO, 'convert_audio -> REQ_BODY -> ', ngx.req.get_body_data())
 
     local input_audio_file = get_wx_media(httpc, req_body["payload"]["media_id"], cjson, pl);
     local converted_audio_file = file_dir .. "/" .. uuid.generate_v4() .. ".mp3";
 
-    ngx.log(ngx.INFO, "Input audio file -> ", input_audio_file);
-    ngx.log(ngx.INFO, "Converted audio file -> ", converted_audio_file);
+    ngx.log(ngx.INFO, "convert_audio -> input audio file -> ", input_audio_file);
+    ngx.log(ngx.INFO, "convert_audio -> converted audio filename -> ", converted_audio_file);
 
     local cmd = "/usr/local/bin/file_convert" .. " " .. input_audio_file .. " " .. converted_audio_file
 
-    ngx.log(ngx.INFO, 'Audio convert command -> ', cmd)
+    ngx.log(ngx.INFO, 'convert_audio -> Audio convert command -> ', cmd)
 
     local result, _, code = os.execute(cmd)
     if result and code == 0 then
-        ngx.log(ngx.INFO, "result -> ", result);
+        ngx.log(ngx.INFO, "convert_audio - > result -> ", result);
         upyun_upload.upload(converted_audio_file, nil);
     else
         ngx.status = 500