Merge pull request #437 from alibaba-damo-academy/dev_cmz_md

zhifu gao

2023-04-27 56508c42af411d84ffaa621a5379af2c6d4ae3ea

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c    1
cc    2
ccc    3
cd    4
d    5
dc    6
dcc    7
dccc    8
cm    9