China has a history of 5,111 years, and its catering culture is extensive and profound, which is mainly influenced by natural environment, folk culture, historical culture and climatic conditions. It gradually formed that the southwest is hot and humid, the north eats more bacon, the coastal islands eat more salty and fresh seafood, and the salt-deficient areas eat sour and spicy and alkaline food. From north to south, the taste tends to fade from salty to light; From west to east, the taste gradually changed from spicy to sweet; From land to sea, the taste changed from heavy to light, forming a big pattern of different tastes in the north and south of the country.