Shangza means that it is also called a steamer in the kitchen, that is, the chef who is responsible for steaming all kinds of dishes in the kitchen. For example, rice, braised pork with plum vegetables, steamed fish, and steamed seafood. In medium-sized hotels or restaurants, it will also be responsible for the rise of bird's nest, shark's fin, abalone and Liaoshen. Shangshi, the sound of "Shi" is "miscellaneous", Guangdong dialect