He used to be a veteran of the Anti-Japanese War and a cadre in the field of education. From the episode of Happy Planet 2, we can see that when Grandpa Bao Lei (baby) came to the school to find the dean, the latter respectfully said that Grandpa Bao Lei was influential in education. The story of finding the kettle in 53 episodes revealed that Grandpa Bao Lei was still an anti-Japanese war veteran.