"Having a son should be like Sun Zhongmou"
This is an ancient saying said by Cao Cao, and it is now often used to praise or encourage.
For example: So-and-so is really capable, "If you have children, you should be like Sun Zhongmou"; if you work hard, you will definitely achieve something, "If you have children, you should be like Sun Zhongmou"! (Note: Sun Zhongmou is Sun Quan, the Great Emperor of Wu)