Make him say

"Get away from my phone!" the man yells, sweat dripping from his forehead continuously. He was sweating profusely even after the fan was on. 

"You will talk" Shi Lian orders, coming near him, "Act smooth."

"Fuck off! I won't do anything!" the man barks, his face etched with fury. Even after knowing what happens, he raised his voice again. 

"You seem to don't like your fingers" Xu Duan comes from his other side and pressed the sharp edge of the knife on the skin of his ring finger. 

The man grits his teeth, letting out infuriating bellows, and struggles to break free. 

Xu Duan, without any emotional thinking, cut off his ring finger at one go. Blood starts dripping from that wounded area like anything. With that he warns, "You yell, your finger's gone again."