If you can’t read Chinese, that just go on http://247tickets.cn , they have this online ticket service and several deals with bars and restaurants. Is always cheaper than the cinema.

Try maoyan or gewara app.

Loads of cinemas are half price on Tuesdays and Thursdays 

Alternatively get some Chinese friends, or ask a colleague to help you

Outside every cinema there are those little postal shacks that sell stuff, they usually have tickets for half nothing. 

Try the invincible taobao, open a taobao account yourself or with the help of your friends. Then you could get basically anything you need from there. In this case, you can get a discount ticket on http://dianying.taobao.com/