html = r'{"code":404,"msg":"u8be5u8d44u6e90u4e0du5b58u5728"}'
print(html)# {"code":404,"msg":"u8be5u8d44u6e90u4e0du5b58u5728"}
print(html.encode('utf-8').decode('unicode-escape'))# {"code":404,"msg":"该资源不存在"}