hi man !
body i donot know which company is good for u in shanghai .what i can suggest is if u donot care salary anyone is ok ,if u want be comfortable just go to local airlines !maybe to u guys -foreign pilots the situation should be better than us!hehe !here are some reference company : gov controling -china easten . air china .shanghai airlines. they all have branch in shanghai. local: air spring .ji xiang . u can go to web search them and if possible u better to go to shanghai! any further help and infor u want let me know!