There are usually two types. One is to put it in a pot for dicing. Fumigation. This can become a proficient method. The other is to turn it into a batter

Put a certain amount of cornstarch in a bowl, then add cold water and stir until the cornstarch is completely dissolved in the water. When cooking, just pour the cornstarch water into the dish and boil it. It should be noted that the water used to stir the cornstarch must be cold water. If hot water is used, the cornstarch will clump. Also, the water with cornstarch added to cooking vegetables must be boiled, otherwise the cornstarch will not work.