Everything that happened in the second book was about 22 years ago, only Yibo, Xiaozhan and Yili died.  In the third book, it is 22 years later, Xiao Zhan, Yibo and Yili are both reincarnated. 

Xiao Zhan thinks that he may have been reincarnated because of Yibo's dreams and visions. What happened 22 years ago is only now beginning to reveal itself in the third book! 

In the second book, I never went in depth of  Yili's past. You only know that he was obsessed with Yibo and hated Xiao Zhan. 

Yili was a psycho, killer, and mafia leader.  Therefore, in the third book, I will introduce Yili and other characters.

Also, the story line will get complicated with secrets being spilled and hearts getting broken. You will learn about a certain character and their dark secrets.
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Now here are the roles
The main characters are...
Xiao Zhan
Yibo
FanXing
Guo Cheng
Jianyu
Yao Zhan

And here are more information
FanXing was nine years old when his parents died it has been 22 years

Guo Cheng: 32
FanXing: 31
Yao Zhan: 27 (currently not in China)
Xiao Zhan: 18 older by one month
Wang Yibo: 18 younger by one month

Guo Cheng and FanXing has been together since
FanXing was 16
Guo Cheng was 17

Been in love for 15 to 16 years

FanXing and his parents are about 11 years apart by age in this book.

I'm not very good at math but this is what I came up with so now you know how old our characters are.

Haha it's quite hard for a rookie like me to explain how this world works but I hope this will you guys get the idea!