What does Zhou Tang mean by marrying Weng Gu?

Weng represents grandpa, my daughter-in-law's father.

Gu represents grandma, the daughter-in-law's own mother-in-law.

My brother represents my uncle, which is my daughter-in-law's brother.

The husband represents the father, that is, the wife's husband.

The woman represents the mother, that is, the daughter-in-law herself.

The kitchen stove hall can be used at will,