Yao: I'm gonna hit you so hard, it'll make your ancestors dizzy.
Chi Fu: Order. People, order.
Citizen: I'll have a pan-fried noodle.
Chien-Po: Ooh, ooh, sweet-and-pungent shrimp.
Citizen: Moo goo gai pan.
Chi Fu: That's not funny.
Mushu: My little baby, off to destroy people.
Answer: For the reasons stated. He believes him to be a highly competent soldier and trainer. While this opinion is probably influenced by Li Shang being his son, it does prove to be correct, as Li Shang's training is what allows the small group to succeed in battling the Huns.