Because chinese manhua don't get enough recognition or love compared to manhwa (korean) and manga (japanese), here my list of all BL (shounen-ai & yaoi) manhua.
This is the second part of my BL Manhua list, here the first and third part:
Part 1: http://www.mangago.me/home/mangalist/1087933/
Part 3: https://www.mangago.me/home/mangalist/2520109/
Historical / Isekai / reincarnate BL I:
https://www.mangago.me/home/mangalist/835803/
Historical / Isekai / reincarnate BL III:
https://www.mangago.me/home/mangalist/2728331/
This is just a list of manhwa/manga which has main character/s who gained a second life in the modern world setup.
Main Characters: Reincarnated/Second Life
Settings: Modern Society
The list is in no particular order.
Feel free to suggest anything in the comment section.