It is said that the third prince Xiao Suxuan is crazy because he can see things that others cannot see. For example, his companion Bai Yanqing is actually a female monster who pretends to be a weak scholar to cheat people with food and drinks.
So his father Xiao Wuyin drove Xiao Suxuan out of the palace, saying that he would let him come back if he could record the stories of every great demon in the four kingdoms.
Xiao Suxuan set off with his companion, and after leaving the city gate, Bai Yanqing threw all the luggage to the third prince.
Bai Yanqing: [Brother Xuan, why not sit down and have some tea.
Xiao Suxuan: [You pay?
Bai Yanqing: [Brother Xuan is generous, so of course you are the one to marry me.