Fruit juice is mainly composed of starch and water. However, the thickness of sauces used in various dishes is different, which should be properly mastered according to different cooking methods and different dish characteristics! Generally speaking, it can be roughly divided into the following two categories! \x0d\ 1)。 Thickening is a kind of powder juice with relatively high concentration when thickening. The ratio of starch to water in Polygonum cuspidatum is generally 1: 1.2. According to their different functions, they can be divided into two types: wrapping and pasting. \x0d\ The astringent juice coated with astringent has the highest concentration, so the viscosity is high, which can make the marinade stick to the surface of raw materials. Suitable for cooking methods such as frying, frying and frying. , such as "fried" and "fried kidney". Its characteristic is that there is almost no marinade in the dish after eating. \x0d\ Thick juice is slightly thinner than wrapped juice, which can make the soup into a thin paste, and the soup and vegetables blend and are soft and smooth. Suitable for braised dishes, such as "stewed shredded squid" and "bean curd soup". \x0d\ 2) Thin. Thin thick juice is thinner. The ratio of starch to water is generally 1: 1.5. According to their different functions, they can be divided into two types: urinary incontinence and insufficient rice soup. \x0d\ astringent juice is thin, which is used to thicken the marinade, and some astringent juice sticks to the vegetables to increase the taste and color of the vegetables; Part of it is in a fluid state. It is suitable for making large dishes or whole dishes by cooking methods such as roasting, frying and frying, such as "braised elbow" and "braised chicken". \x0d\ Rice soup (milk soup) has the thinnest juice and can't stick to raw materials. The purpose of thickening is to make the soup of vegetables a little thicker, so that the raw materials can float and taste a little thicker. Suitable for cooking light dishes, such as "roasted shark's fin" and "roasted sea cucumber".