HarmonyOS flutter_flutter开发环境搭建问题

依据HarmonyOS化指导文档：https://gitee.com/openharmony-sig/flutter_samples/tree/master/ohos/docs搭建HarmonyOS Flutter开发环境，检查HarmonyOS配置时(flutter doctor -v)，未检查到HarmonyOS Sdk，不知是哪里出了问题？

报错如下：

[X] HarmonyOS toolchain - develop for HarmonyOS devices
    X HarmonyOS Sdk not found;
      please do that, first: download from https://developer.harmonyos.com/cn/develop/deveco-studio#download_cli ;
      second: follow this document:
      https://developer.harmonyos.com/cn/docs/documentation/doc-guides-V3/ide-command-line-ohsdkmgr-0000001545647965-V3
      to install OpenHarmony sdk with ohsdkmgr;
      If the Ohos SDK has been installed to a custom location, please use
      `flutter config --ohos-sdk` to update to that location.

      Ohpm version 5.0.1
      Node version v14.9.0
      Hvigorw binary at
      F:\OpenHarmony\commandline-Windows-5.0.3.401\commandline-Windows-5.0.3.401\commandline-tools-windows-x64-5.0.3.401
      \command-line-tools\bin\hvigorw.bat