Since a young age, Cheng Jianguang's parents and teachers taught him that rules such as "Harmoniousness is a treasure, forbearance is a virtue," "Keeping silent on the faults of good friends makes for a long and good friendship," "Though you see wrong, it's best to say little" were the touchstones for maintaining good relationships with other people. He took these lessons to heart, and learned to never offend others in his actions and speech, and to always take care of his relationships with others, earning him the reputation of a "good man" with those around him.