The places where the sources of grain in the wholesale market are cheaper are mainly rural production areas and large grain trading markets. The grain prices in rural production areas are relatively low because farmers harvest grain directly from their own farmland, eliminating the cost of the middle link, so the price is relatively low. In addition, the grain supply in rural production areas is relatively sufficient because farmers grow a large amount of grain in their farmland. Large grain trading markets are also one of the places where the sources of grain in the wholesale market are cheap. These markets usually gather a large number of grain suppliers and buyers, forming a large trading scale. Due to the influence of supply and demand, the grain prices in large grain trading markets are relatively low. In addition, large grain trading markets are also highly competitive, and suppliers will attract buyers through price competition, thereby reducing the price of grain. In addition, you can also seek more favorable prices by directly negotiating with grain wholesalers or grain suppliers. Sometimes, wholesalers or suppliers may give certain discounts or discounts based on factors such as the amount of purchase and the longevity of the cooperative relationship. In summary, the places where the sources of grain in the wholesale market are cheap are mainly rural production areas, large grain trading markets, and direct negotiations with wholesalers or suppliers.