1, the usage of Ni sauce: Ni sauce is a kind of honorific, and younger people often call their brother. This title conveys a feeling of respect and closeness, and expresses respect and dependence on the elders. Ni sauce is used in some intimate relationships, such as family members or very close friends.

2. Usage of Oni sauce: Oni sauce is a slightly spoiled and childish name, and it is also the first-class elder used by young people to address their brothers. This title conveys a feeling of loveliness and intimacy, and expresses love and dependence on elders. Oni sauce is used in some intimate and relaxed relationships, usually between friends or close lovers.