diff --git a/zh-cn/application-dev/file-management/app-file-upload-download.md b/zh-cn/application-dev/file-management/app-file-upload-download.md
index 6e04ff93d8700c4357172d72db1720eaa315cab8..a4c8e623bfaa943a9043fcc1b9bbc458dfe42243 100644
--- a/zh-cn/application-dev/file-management/app-file-upload-download.md
+++ b/zh-cn/application-dev/file-management/app-file-upload-download.md
@@ -48,7 +48,7 @@ try {
     .then((uploadTask) => {
       uploadTask.on('complete', (taskStates) => {
         for (let i = 0; i < taskStates.length; i++) {
-          console.info(`upload complete taskState: ${JSON.stringify(taskStates[i])}');
+          console.info(`upload complete taskState: ${JSON.stringify(taskStates[i])}`);
         }
       });
     })