Responses
![](https://pic1.mangapicgallery.com/r/avatar/17/u126950_50x50.jpg?2)
I think that his older brother is his twin that passed away. That's why the mother got ill. And as to not loose her too the father decides to make the younger brother to become Fei Ran instead:
http://www.mangago.me/read-manga/the_tryant_falls_in_love/mdx/mpn_chapter-2302998/pg-9/
plot twist: fei ran is a spirit lmao