Charmaine Sheh is infiltrating the triads once again. Amongst the danger, she has to find the sixth mysterious undercover agent between the two notorious gang members, Louis Koo, who plays a mysterious drug dealer, and Nick Cheung, a tactical cold-blooded killer.
Line Walker was released in China on  August 11, 2016. It is directed by Jazz Boon and produced by Wong Jing.
Trailer
https://www.youtube.com/watch?v=8K1wC8SydbY
Louis Koo is the new Andy Lau.
just appearing in every trash movies:/