1. Light soy sauce is okay, but it is best not to use dark soy sauce, because light soy sauce can also be used for cold dressing, which is equivalent to eating it directly.

2. Light soy sauce is reddish-brown in color, has a salty taste, and has a strong soybean aroma. Because of its light color, it is often used for seasoning. It is a good partner for home-cooked stir-fries or cold dishes.

3. Dark soy sauce is the "sublimated version" of light soy sauce. On the basis of light soy sauce, caramel is added, and the thick soy sauce made through a special process is tan and darker in color. It adds color to meat food and is a great helper for all kinds of fragrant dishes.