diff --git a/zh-cn/application-dev/reference/apis/js-apis-image.md b/zh-cn/application-dev/reference/apis/js-apis-image.md
index 15e663eb67d9bd63ad7b10f19d8a42ed74133565..9adf492ee4d8498d9d713dc074d1873f71f41972 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-image.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-image.md
@@ -982,7 +982,8 @@ class MySequence {
         return true;
     }
     async unmarshalling(messageSequence) {
-        await image.unmarshalling(messageSequence).then(async (pixelMap) => {
+        let pixelParcel = await image.createPixelMap(new ArrayBuffer(96), {size: { height:4, width: 6}});
+        await pixelParcel.unmarshalling(messageSequence).then(async (pixelMap) => {
             this.pixel_map = pixelMap;
         })
         return true;
@@ -1039,7 +1040,8 @@ class MySequence {
         return true;
     }
     async unmarshalling(messageSequence) {
-        await image.unmarshalling(messageSequence).then(async (pixelMap) => {
+        let pixelParcel = await image.createPixelMap(new ArrayBuffer(96), {size: { height:4, width: 6}});
+        await pixelParcel.unmarshalling(messageSequence).then(async (pixelMap) => {
             this.pixel_map = pixelMap;
         })
         return true;