So, from what I've learned, Mamizou and Ran don't like each other, but they may as well be unified by liking Chen. I think the rest of the world could learn a lesson from these two.
Amateurs can't tell that Chen was sent for an assassination mission here. In about one second, Chen's right hand will connect with Mamizou's lower jaw and within that very same second, Mamizou's head will be turned 180 degrees.