Happy New Year

In 2019, this book is full of disasters and disasters. I would like to thank you all for your company and support along the way, otherwise Laoyu would not have the motivation to revise it continuously and finally unblock it.

2020, the new year starts, Laoyu will finish writing this unfinished book, and give an explanation to the readers who have been supporting Laoyu, and give myself an explanation.

Here, I wish all friends who have been supporting Laoyu a happy new year, all the best in 2020, and everything will come true.