"Three Steams" originally refers to steaming fish, meat and vegetables. Some people say that "mian yang Three Steams" is steamed pork, steamed pearl yuanzi and steamed white balls, while others say that "mian yang Three Steams" is steamed herring, steamed pork and steamed vegetables. In fact, these statements are biased. The correct statement should be: "mian yang Three Steams" refers to the floorboard of steamed livestock, steamed aquatic products and steamed vegetables.

Yangsanzheng is one of the traditional famous dishes of Han nationality in mian yang, Hubei Province (now Xiantao City), which belongs to Hubei cuisine. This dish is tender and soft; Original flavor; Light; Soft. It is a pearl in Hubei cuisine and occupies an important place in the famous cuisines in China. People in mian yang love to eat steamed vegetables, and there is a custom of "steaming without vegetables", which is called the hometown of steamed vegetables.