Faced with two big homework to do, and Tuesday and Wednesday are due to be handed in, there is no way to spare so much time code, and I have to ask everyone for a leave.

If tomorrow's homework is done quickly today, it may be possible to rush out a chapter, but it should also be sent late, I hope you can forgive me.

"7 Billion People's Crossing" is on leave, and it may not be even more so today It's in hand, please wait a while,

Once the content is updated, please refresh the page again to get the latest updates!