Both Chen and Qiu offered their own sanshu .
This classification was later criticised by Chen Mengjia ( 1911 -- 1966 ) and Qiu Xigui .
Both Chen Mengjia and Qiu Xigui offered their own sanshu .
This classification was later criticised by Chen Mengjia ( 1911 -- 1966 ) and Qiu Xigui .