"I have the most useless system..."
Start with an Analects of Confucius, and the reward will be full back.
"Congratulations on passing the Analects of Confucius and receiving a copy of Mencius."
Lu Xiao: "???"
In this way, Gu Xiao evolved from a scumbag.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.