chapter 40 I just don’t understand

The robber's black car drove to an abandoned factory building.

The building has a total of four floors, but it is obviously an abandoned project and was abandoned before it was completed. Most of the windows outside the wall were not paneled. Many people stood at various windows, holding rifles in their hands and looking at the black cars below.

The robber got out of the car and four people came over immediately. One of them said: "Matsu, thank you for your hard work."

Matsu...