Who did it?

"I……"
When Cheng Yuefei heard the words "Are you done?", his face turned pale instantly.
He forced himself to remain calm, swallowed his saliva and said, "No, I haven't finished yet!"
"You haven't finished yet? Then you talk too much."
Nash Lin eyes narrowed, and he slapped Cheng Yuefei in the air with his backhand.
With a loud slap, Cheng Yuefei's body was suddenly slapped up one meter from the ground, and then he quickly turned two circles in the air, and finally fell heavily...