儿子立正跟爹走儿子立正跟妈走
[ér zi lì zhèng gēn diē zŏu ér zi lì zhèng gēn mā zŏu]
It is a humorous reference to the traditional expectation that a son would follow the lead of his father ('son at attention follows dad'). The addition of following mom shows evolving dynamics in family relationships.