Mr for master

[siguangli]

Before submitting a new pull request, please make sure:

• Test cases have been added/updated for the code you will submit.
• Documentation has added or updated.
• Commit message is following the Convention Commit guideline.
• Squash the repeat code commits, short patches are welcome.

[tencent-adm]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[codecov-commenter]

Codecov Report

Merging #295 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #295   +/-   ##
=======================================
  Coverage   70.30%   70.30%           
=======================================
  Files          24       24           
  Lines        1357     1357           
=======================================
  Hits          954      954           
  Misses        403      403           

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