Naruto: Train a Teacher at Full Level, and You Will Become Stronger by Teaching Apprentices

[Daily interactions, pretending to be slapped in the face, secretly invincible. Yu Qianye travels through Hokage Konoha and is bound to a full-level emotional training system. When teaching as a disciple, he can trigger the return of experience critical hits and become stronger. [Ding, Hinata Hinata has successfully mastered the Moon Step, triggering a hundredfold experience return. Congratulations on learning the full-level Moon Step. [Ding, Hinata Hinata has successfully mastered the finger gun, triggering a hundredfold experience return. Congratulations on learning the full level finger gun. [Ding, Hinata Hanabi has successfully mastered swordsmanship, triggering a 10,000-fold experience return. Congratulations on learning the full-level swordsmanship. A few years later, Nagato invaded Konoha, and looked at the puppet Pain being beaten up one by one, with a confused look on his face. Who can tell who feels "how many floors can a bag of rice carry"?