The price range of commodities mostly comes from the level of supply and demand, and of course it will also be restricted by departments and institutions such as the Price Bureau. For example, the scenes we saw before, such as grabbing Banlangen and grabbing salt, will cause imbalance between supply and demand in the market in a short time, but the national macro-control will control these well, but there are also adjustment mechanisms to worry that "grain cheap hurts farmers" and allow some agricultural and sideline aquatic products to fluctuate relatively freely. There are two well-known "supernumerary" indexes in China, one is the share price of Maotai, and the other is the price of pork, the main source of red meat in China. When the price is high, farmers start to raise it, and after half a year, they can sell it, which is likely to have fallen ... In fact, this can't be blamed on farmers, because the information is not equal, and there are "chasing up and killing down" and "China itself".