C501

After class.

The students of the third class flew to all parts of Jiangling Mountain with leaflets held in their hands.

The teenagers, led by Xuanyuan Hui, looked at the flyers in their hands and were a little worried. How long would it take for them to send nearly a thousand flyers?

"Hui Hui, come to think of it, let's go to bed early." Someone said.

Xuanyuan Hui smiled. "It's simple