diff --git a/CryptoArchitectureKit/entry/src/main/ets/pages/HMACFailed.ets b/CryptoArchitectureKit/entry/src/main/ets/pages/HMACFailed.ets
index cdb6b65a034c6574751620df4fa52cc6249b230d..2da8127b1e3e5491d0e93daa9fd1ca7e7f99cb93 100644
--- a/CryptoArchitectureKit/entry/src/main/ets/pages/HMACFailed.ets
+++ b/CryptoArchitectureKit/entry/src/main/ets/pages/HMACFailed.ets
@@ -12,12 +12,58 @@
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-import { cryptoFramework } from '@kit.CryptoArchitectureKit';
+
 
 /*
-* FAQ:HMAC加密报错：error: convert sym key failed
+* FAQ:HMAC加密报错：Error message:convertSymKey key failed!
 */
 
 // [Start HMACFailed]
-let symKeyGenerator = cryptoFramework.createSymKeyGenerator('HMAC');
+import { cryptoFramework } from '@kit.CryptoArchitectureKit';
+import { buffer } from '@kit.ArkTS';
+
+@Entry
+@Component
+struct HMACFailed {
+  // [StartExclude HMACFailed]
+  @State message: string = 'Hello World';
+  // [EndExclude HMACFailed]
+  ConvertKeySync() {
+    // 对称密钥长度为28字节，224比特。
+    let keyMessage = '87654321abcdefgh87654321abcd'; // 执行成功
+    // 执行成功，key encoded data：56,55,54,53,52,51,50,49,97,98,99,100,101,102,103,104,56,55,54,53,52,51,50,49,97,98,99,100
+    // 对称密钥长度为26字节，208比特。
+    // let keyMessage = '87654321abcdefgh87654321ab'; // 执行失败
+    // 执行失败，报错：Error message:convertSymKey key failed!
+    let keyBlob: cryptoFramework.DataBlob = {
+      data: new Uint8Array(buffer.from(keyMessage, 'utf-8').buffer)
+    }
+    // 消息认证码算法：HMAC，摘要算法：SHA224，密钥长度（bit）：224，字符串参数：HMAC|SHA224
+    let symKeyGenerator = cryptoFramework.createSymKeyGenerator('HMAC|SHA224');
+    let key = symKeyGenerator.convertKeySync(keyBlob);
+    let encodedKey = key.getEncoded();
+    console.info('key encoded data：' + encodedKey.data);
+  }
+  // [StartExclude HMACFailed]
+  build() {
+    RelativeContainer() {
+      Text(this.message)
+        .id('HelloWorld')
+        .fontSize($r('app.float.page_text_font_size'))
+        .fontWeight(FontWeight.Bold)
+        .alignRules({
+          center: { anchor: '__container__', align: VerticalAlign.Center },
+          middle: { anchor: '__container__', align: HorizontalAlign.Center }
+        })
+        .onClick(() => {
+          this.message = 'Welcome';
+          this.ConvertKeySync();
+        })
+    }
+    .height('100%')
+    .width('100%')
+  }
+  // [EndExclude HMACFailed]
+}
+
 // [End HMACFailed]