C90 Ringa's challenge

Although Jiang Chen had always been told by Yi Cheng not to drink, he would at least drink a few cups today. Yi Cheng did not drink, because he had to drive.

"I will be leaving tomorrow. Here, I have to ask you guys for a moment. Han Jun is a bit childish, although he normally won't be able to tell, but after getting to know him, he will know you guys