diff --git a/zh-cn/application-dev/reference/apis/js-apis-file-statvfs.md b/zh-cn/application-dev/reference/apis/js-apis-file-statvfs.md
index 553c844ce0e0ff128b4d740b1e710f3fcad2e3c9..f479d0de6190660e2e645484f50cc68c9634f509 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-file-statvfs.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-file-statvfs.md
@@ -42,7 +42,7 @@ getFreeSize(path:string):Promise<number>
   });
   ```
 
-## statfs.getFreeSize
+## statvfs.getFreeSize
 
 getFreeSize(path:string, callback:AsyncCallback<number>): void
 
@@ -70,7 +70,7 @@ getFreeSize(path:string, callback:AsyncCallback<number>): void
   });
   ```
 
-## statfs.getTotalSize
+## statvfs.getTotalSize
 
 getTotalSize(path: string): Promise<number>
 
@@ -101,7 +101,7 @@ getTotalSize(path: string): Promise<number>
   });
   ```
 
-## statfs.getTotalSize
+## statvfs.getTotalSize
 
 getTotalSize(path: string, callback: AsyncCallback<number>): void
 
diff --git a/zh-cn/application-dev/security/cert-guidelines.md b/zh-cn/application-dev/security/cert-guidelines.md
index 05240c1eb3adf66cc3133faa12f674fb99b9e807..e25951555dced38ce3d53290920c97c97b8d8886 100644
--- a/zh-cn/application-dev/security/cert-guidelines.md
+++ b/zh-cn/application-dev/security/cert-guidelines.md
@@ -441,7 +441,7 @@ function crlEntrySample() {
     }
 
     // 获取被吊销证书的序列号
-    let serialNumber = crlEntry.getSerialNumber();
+    serialNumber = crlEntry.getSerialNumber();
     
     // 获取被吊销证书的吊销日期
     try {