Swiss cheese and custard are the must-have Chinese translations of Western food. Swiss cheese is different from ordinary cheese. Swiss cheese has sour taste. Ordinary cheese is sour-free. Switzerland is a mountain country. The arable land is rare, but it has large pieces. Fertile pastures, especially in the Central Plateau, Jura Mountains and the Alps. In the meantime, the production of cheese is really forced by the environment. In the early years, the herdsmen grazing in the alpine pastures, staying for half a year, there is no road extending in all directions, and there is no modern means of transportation. Fresh milk must be processed to be preserved for a long time.