Half of this seems to be an old school submarine movie, the other half a Special Ops action movie. Here's the official US trailer (+ poster for Dante Lam's Operation Hadal , direct from YouTube : ...

The Chinese action movie is directed by Qin Pengfei, and stars Ashton Chen, Bao Bei Er, Qu Shanshan, Li Daqiang, Liu Fengchao, Wang Zhengquan, and Zhao Runnan. The movie boasts all the bloody ...