1. Water starch is cornstarch. Water starch: Generally, water starch is dry starch plus water, and together it is called water starch.

2. Corn starch, also known as powder, is a polysaccharide polymer formed by the condensation of some glucose molecules. Starches used for cooking mainly include mung bean starch, potato starch, wheat starch, water chestnut, and lotus root starch. Starch is insoluble in water. When heated to 60 degrees Celsius with water, it turns into a colloidal solution. Cornstarch takes advantage of this property of starch.