How to make the batter for fried things?

The batter of fried food is mixed as follows:

Flour: starch = 3: 1, add a little light soy sauce, then add water little by little, and keep stirring until the batter flows but stagnates.

The batter should be thicker, not thinner. Starch should be added according to the ratio of 1/3, so that the fried things will not collapse as soon as they are released.