Let me record the experienced I had in Pudong airport before I forgot.
At the X-ray security check machine, a female security guard is supervising people to put their stuff into the machine. This is the conversation.
Before I put the bag there, she asked: “Do you have a laptop?” I pulled my laptop out of the bag.
She asked: Anything in your pocket? I used my left hand to pull the wallet from my pocket.
“Phone?” She asked prompted. I got my phone from the other pocket.
“Coins left in your pocket?” She is right again. I got two 1 RMB coins. I laughed.
Then she said without any emotion: “You can go now.” She is right again. I have nothing in my pocket or hand at that time.
Hmmm… This lady is very experienced.