Update readme_cn.md

zhifu gao

2023-06-29 c7d5a94ae28d76b86497e59cdd92498f6937677c

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beam_size: 10
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 1.0
lm_weight: 0.7