"Little brother, I see that your bones are exquisite and your foundation is extraordinary. You are a martial arts genius that is hard to come by in a hundred years. I have a martial arts secret manual here. I think I am fated to sell it to you at half price. In the future, the mission to save the world will be completed by you!"
Webnovel 
its from movie kungfu hustle
"Little brother, I see that your bones are exquisite and your foundation is extraordinary. You are a martial arts genius that is hard to come by in a hundred years. I have a martial arts secret manual here. I think I am fated to sell it to you at half price. In the future, the mission to save the world will be completed by you!"
I Got Stronger By Using Copper Coins Until I Am Invincible
Eastern · White Foxes Are Not White