First, the grain and oil wholesale market. Grain and oil wholesale market, fundamentally speaking, can not be regarded as the initial channel. Most shops in the grain and oil wholesale market have their own channels. After buying in bulk, selling in bulk is equivalent to the middleman earning the difference. The price and quantity are relatively unstable, and the price will be higher. But the advantage is that merchants in this wholesale market have generally opened stores for many years, and their reputation is relatively guaranteed.