Add document for Mandarin model.
Add document for Mandarin model.

Superjom/models-1,lcy-seso/models,PaddlePaddle/models,qingqing01/models,kuke/models,qingqing01/models,kuke/models,kuke/models,qingqing01/models,lcy-seso/models,Superjom/models-1,PaddlePaddle/models,kuke/models,Superjom/models-1,lcy-seso/models,PaddlePaddle/models