1. sauce is a paste-like seasoning, which is made of beans, wheat flour, fruit, meat or fish and shrimp. It originated in China and has a long history. At present, the common sauces in China are divided into two categories: sweet noodle sauce with wheat flour as the main raw material and bean paste with beans as the main raw material. Now there are condiments such as meat sauce, fish sauce and jam.

2. Salutation, sauce comes from the homonym of Japanese "ちゃん". No matter whether the speaker is male or female, you can say the same thing. Regardless of whether the other person is a man or a woman, it is generally used for people who are very close.

Adding "sauce" to names other than surnames is generally used between extremely close people, such as:

1.Mikoto chan (magic forbidden book catalogue, a scientific super electromagnetic gun) is Mikoto Meiling's name for his daughter Misaka Mikoto.

2. Call his best friend Tian "Chen" ("imaginary student union").

3. Naruto Uzumaki called teammate Woody Sakura chan (Naruto)? [3]?

4. Jin Mu researched Kirishima Dongxiang Dongxiang sauce ("Tokyo").

Reference source Baidu Encyclopedia Sauce