The three are criminals with high IQs, one is in charge of the "pornography" of the nightclubs in the southern district, the other is in charge of "gambling", and the other is the most flexible of the three. He is in his early forties and was once a brilliant student studying abroad. He is in charge of the most complicated 'poison', and he is responsible for the planning of the purchase of various routes, calculation of risks, and so on.

Those four 'Wu' are very skilled characters, and they all have some backgrounds, and that scorpion is the most vicious one among them.

Every time he makes a move, he never leaves a way for his opponent to survive, his viciousness is even more vicious than Zhao Feng's.