diff --git a/zh-cn/application-dev/database/database-relational-guidelines.md b/zh-cn/application-dev/database/database-relational-guidelines.md
index 7899ba0076d8142210a045e7e0d0da1a6837d0e9..26df601aaf7dfcff5ff6fc1bce3a06640529c5b9 100644
--- a/zh-cn/application-dev/database/database-relational-guidelines.md
+++ b/zh-cn/application-dev/database/database-relational-guidelines.md
@@ -331,7 +331,7 @@
     promise.then((result) => {
         console.log('sync done.')
         for (let i = 0; i < result.length; i++) {
-            console.log('device=' + result[i][0] + ' status=' + result[i][1])
+            console.log('device=' + result[i][0] + 'status=' + result[i][1])
         }
     }).catch((err) => {
         console.log('sync failed')