Cooking flour and starch are just named differently, there is no essential difference. Cornstarch - Strictly speaking, it is the general name for various starches. It is mainly used for thickening and snacks. It is called Tuanfen in the north and it is called Lingfen in Shanghai. Cornstarch does not specifically refer to any kind of starch. Cornstarch is used in mainland recipes and recipes. Nouns that often appear in Hong Kong-style recipes are mostly used for hooks. The corn flour used in mainland China and Hong Kong is corn flour, while the corn starch commonly used in Taiwan is Taibai flour. In Chinese cooking, cornstarch not only adds a smooth texture to the food, but is also commonly used as a marinade to soften the meat. Soda is the transliteration of Soda, and its chemical formula is Na2CO3. It has many names. Its scientific name is sodium carbonate. In addition to its common name of soda, it is also called soda ash or soda ash.