The three M group members left behind to guard, strictly speaking, were not truly members of the M group. According to the M group, they were just part of the periphery. They hadn't actually joined the M group, because the M group had a strict hierarchy and stringent commands. Sometimes, their strict execution of orders actually hindered things, so it was necessary to find some quick-witted peripheral members. These members weren't very loyal to the M group; they were only interested in getting some benefits.
Even though the person being questioned wanted to say something in his heart, on the surface, he remained respectful. He knew the leader in black could take his life at any moment, and no amount of money was more important than his life.
He had already followed orders and found a rope to tie up Liu Chen. The others had begun preparing to leave. Grumbling, he came down.