Update README_zh.md (#1007)

yufan

2023-10-13 dc5b54b77d5aadde15cb0734ae6a5238b21aa78f

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# -*- coding: utf-8 -*-
 
 
try:
    strtype = basestring
except NameError:
    strtype = str
 
 
def to_s(val):
    try:
        return unicode(val)
    except NameError:
        return str(val)