Book Friend Group 457,231,008

I specially opened a single chapter to introduce the book friend group, Junyang number 457231008.

The group owner is the author, everyone can put forward any suggestions and opinions in it.

In addition, please don't make trouble in the group, we must maintain a harmonious and friendly atmosphere.

For old drivers, it is better to drive as little as possible, so as not to pollute the flowers of the motherland (laughs).