diff --git a/zh-cn/application-dev/reference/apis/js-apis-zlib.md b/zh-cn/application-dev/reference/apis/js-apis-zlib.md
index 708f07cf39999a80c913d3f057594c8b38b97698..0a38b17b7d36a1f34e3f796eb1ee7b3429f26ca4 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-zlib.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-zlib.md
@@ -49,9 +49,9 @@ let options = {
 };
 
 zlib.zipFile(inFile, outFile, options).then((data) => {
-    console.log('zipFile result is ' + JSON.Stringify(data));
+    console.log('zipFile result is ' + JSON.stringify(data));
 }).catch((err) => {
-    console.log('error is ' + JSON.Stringify(err));
+    console.log('error is ' + JSON.stringify(err));
 });
 ```
 
@@ -69,9 +69,9 @@ let options = {
 };
 
 zlib.zipFile(inFile , outFile, options).then((data) => {
-    console.log('zipFile result is ' + JSON.Stringify(data));
+    console.log('zipFile result is ' + JSON.stringify(data));
 }).catch((err)=>{
-    console.log('error is ' + JSON.Stringify(err));
+    console.log('error is ' + JSON.stringify(err));
 });
 ```
 
@@ -113,9 +113,9 @@ let options = {
   strategy: zlib.CompressStrategy.COMPRESS_STRATEGY_DEFAULT_STRATEGY
 };
 zlib.unzipFile(inFile, outFile, options).then((data) => {
-    console.log('unzipFile result is ' + JSON.Stringify(data));
+    console.log('unzipFile result is ' + JSON.stringify(data));
 }).catch((err)=>{
-    console.log('error is ' + JSON.Stringify(err));
+    console.log('error is ' + JSON.stringify(err));
 })
 ```