Mascarante

The final warning that Lu Chen said to Lao Mao was the last mercy he would be bestowing upon the Sy Clan. The people who are involved in the underground city and the one he's usually involved in for business in the general public are vastly different people. The so-called 'general public' was more fearful of the law, and they don't randomly kill people at the height of their emotions. He guessed he'd rather call it 'civilized'? 

On the contrary, just like how the public perceives those people who are involved in the black market and underground city, it was filled with violence and all sorts of crimes. Murder, Illegal Trading, Drugs, and many more things would immediately get them in jail. 

It is a place in which kindness doesn't exist nor it is for weakhearted people. That's why he pledged to not bring Xiu Mei here at all. 

His son?