2. The husband calls his wife's brother "brother" orally and face to face, which is called together with his wife. The person or address written is called "brother-in-law" and "brother-in-law".
3. The husband calls his wife's sister "Sister" verbally, but with his wife. The person or address written is called "big sister" and "big sister".
Husband calls his wife's sister "elder sister" orally and face to face, which is called together with his wife. The person or address written is called "Sister-in-law" and "Little Aunt".
Extended data
The ancients in China paid special attention to kinship terms.
If there is a marriage relationship, add the word "marriage" in front of it, such as uncle, brother, sister, brother and sister.
With the progress of society, the relationship between people has changed greatly, and the original concepts of relatives and families have also changed greatly. Kinship appellation is not so particular, but it is occasionally used in written language. Now when we use kinship terms in our daily life, it usually refers to our relationship with relatives, which is very simple and clear, such as father, mother, brother, younger brother, sister and so on.
Those who are related by marriage also changed their names in person, such as father-in-law, mother-in-law, brother-in-law, sister-in-law, brother-in-law, sister-in-law, and so on.
Baidu encyclopedia-family appellation
Baidu encyclopedia-appellation etiquette