diff --git a/README.en.md b/README.en.md
index 0416b341fe3ce189ab01b7908247f5c1855cd21d..8ccedf5ceaf043b377174bb407fa61c4f9b545c3 100644
--- a/README.en.md
+++ b/README.en.md
@@ -16,7 +16,7 @@ This warehouse is based on the compatible extension of flutter sdk for OpenHarmo
 
 * Building steps:
 
-   !!! Info  For Windows environment, please set environment variables in Environment Variables Dialog
+   **For Windows environment, please set environment variables in Environment Variables Dialog**
 
    1. Download [command line tool](https://developer.harmonyos.com/cn/develop/deveco-studio#download_cli), and configure the environment variables ohpm and sdkmanager. After the download is complete, execute `ohpm/bin/init` to install ohpm. Refer to the guidance document: [ohpm usage guide](https://developer.harmonyos.com/cn/docs/documentation/doc-guides-V3/ide-command-line-ohpm-0000001490235312-V3).
 
diff --git a/README.md b/README.md
index cb16c4225f5715b93f37073650ff479e65d577c1..e08a5c0f820db6366375aecd14d1d9fe2bd94e1b 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ Flutter SDK 仓库
 
 * 构建步骤：
 
-   !!! Info  Windows环境请通过编辑Windows下的“环境变量”页面设置环境变量
+   **Windows环境请通过编辑Windows下的“环境变量”页面设置环境变量**
 
   1. 下载[命令行工具](https://developer.harmonyos.com/cn/develop/deveco-studio#download_cli)，并配置环境变量ohpm与sdkmanager，下载完成后执行`ohpm/bin/init`安装ohpm。参照指导文档：[ohpm使用指导](https://developer.harmonyos.com/cn/docs/documentation/doc-guides-V3/ide-command-line-ohpm-0000001490235312-V3)。
 
diff --git a/packages/flutter_tools/lib/src/artifacts.dart b/packages/flutter_tools/lib/src/artifacts.dart
index 5b14b630afd0f5fa1668f32f2fc592147bf06e81..574b42346293263fd4e886fdd8c2567812fcfd60 100644
--- a/packages/flutter_tools/lib/src/artifacts.dart
+++ b/packages/flutter_tools/lib/src/artifacts.dart
@@ -592,7 +592,7 @@ class CachedArtifacts implements Artifacts {
   }
 
   String _getOhosArtifactPath(Artifact artifact, TargetPlatform platform, BuildMode mode) {
-    final String engineDir = _getEngineArtifactsPath(platform, mode)!;
+    final String? engineDir = _getEngineArtifactsPath(platform, mode);
     switch (artifact) {
       case Artifact.genSnapshot:
       case Artifact.frontendServerSnapshotForEngineDartSdk:
diff --git a/packages/flutter_tools/templates/app_shared/ohos.tmpl/har/flutter_embedding.har.debug.10 b/packages/flutter_tools/templates/app_shared/ohos.tmpl/har/flutter_embedding.har.debug.10
index 6b41214e49ef628929399a7a70adc39a17374d35..d8e07ca297de2100ce605f8af1126daf6eeb5d8f 100644
Binary files a/packages/flutter_tools/templates/app_shared/ohos.tmpl/har/flutter_embedding.har.debug.10 and b/packages/flutter_tools/templates/app_shared/ohos.tmpl/har/flutter_embedding.har.debug.10 differ
diff --git a/packages/flutter_tools/templates/app_shared/ohos.tmpl/har/flutter_embedding.har.release.10 b/packages/flutter_tools/templates/app_shared/ohos.tmpl/har/flutter_embedding.har.release.10
index 07bdf8f9b5ad61a27a4ddb0d89e2ef74c857b8b7..da9b320a09600f678975b827160441e46144bf08 100644
Binary files a/packages/flutter_tools/templates/app_shared/ohos.tmpl/har/flutter_embedding.har.release.10 and b/packages/flutter_tools/templates/app_shared/ohos.tmpl/har/flutter_embedding.har.release.10 differ