Father-in-law is the wife's address to her husband's father, and it is also the address of grandfather and grandfather. That is, the son of your father-in-law is the father of my wife's son. For "you" as the father-in-law, your son's wife, that is, "you", is the daughter-in-law, referring to the son's wife.
Call mom, commonly known as "grandma", "aunt" and "grandma". In written language, they are called "mom", "grandma", "grandma", "grandma" and so on. Call dad "ABBA", "ABBA" and "Grandpa". In written language, they are called "father", "grandfather", "grandfather", "father", "grandfather" and so on.
Mom's mother, commonly known as "grandma", "grandma" and "old mother" Written language is called "mother", "grandmother", "big mother" and "queen mother". Fathers who call their mothers are commonly known as "Grandpa", "Grandpa", "Grandpa" and "Grandpa". In written language, they are called "Fu", "Grandpa", "Da" and "Wang".
A father who calls his father is commonly known as "Grandpa", "Grandma", "Dad" and "Grandpa". The written language is called "Grandpa", "Grandma Grandpa", "Big Dad" and "Dad Wang". Call mom and dad, commonly known as "mother", "grandmother" and "nanny". The written language is called "Grandma", "Grandma", "Big Mom" and "Empress Dowager".