In cooking, a teaspoon is 5 ml, soy sauce, vinegar and salt are basically 5 grams, and oil is equivalent to 4 grams;

A teaspoon 15ml is 15g, which is equivalent to 3 teaspoons.

The weight of tea spoon is lighter than that of spoon. Generally speaking, a tea spoon refers to a small iron spoon, which is relatively flat and can only hold a little liquid. Soup spoon refers to a spoon made of ceramics, which is deep and can hold more liquid. The ratio of tea spoon to soup spoon mentioned in the recipe is about 3: 1, which means that three tea spoons are equal to one soup spoon.