The night is like a thick piece of black velvet, tightly wrapping the bustling city of Binhai City. The neon lights are flashing, the traffic is busy, and beneath the surface hustle and bustle, there is an unknown undercurrent. On the edge of the city, an abandoned old shipyard warehouse was now brightly lit and bustling with people. The air was filled with the pungent smell of sweat, tobacco and cheap alcohol. This is the largest underground black boxing market in Binhai City, a lawless place full of violence, blood and lust for money.