diff --git a/sdk/golang-demo/start-to-use.md b/sdk/golang-demo/start-to-use.md
index bd7d9e9b34728fc57b98ac9b1a53cf15813d26b0..1aedc2d1f87eee97a228870e1dbac3568c5bb59a 100644
--- a/sdk/golang-demo/start-to-use.md
+++ b/sdk/golang-demo/start-to-use.md
@@ -94,7 +94,7 @@ func main() {
 	listObjsResponse, err := s3Client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{
 		Bucket:    aws.String(bucket),
 		Delimiter: aws.String("/"),
-		MaxKeys:   50,
+		MaxKeys:   aws.Int32(50),
 	})
 	if err != nil {
 		log.Println("list objects failed, err=", err)
@@ -125,7 +125,7 @@ func getS3Client(key, secret string) (*s3.Client, error) {
 	if err != nil {
 		return nil, err
 	}
-
+        cfg.Region = "cn-east-1"
 	s3client := s3.NewFromConfig(cfg)
 	return s3client, nil
 }
@@ -199,7 +199,7 @@ func getS3Client(key, secret string) (*s3.Client, error) {
 	if err != nil {
 		return nil, err
 	}
-
+        cfg.Region = "cn-east-1"
 	s3client := s3.NewFromConfig(cfg)
 	return s3client, nil
 }
@@ -289,7 +289,7 @@ func getS3Client(key, secret string) (*s3.Client, error) {
 	if err != nil {
 		return nil, err
 	}
-
+        cfg.Region = "cn-east-1"
 	s3client := s3.NewFromConfig(cfg)
 	return s3client, nil
 }