1, cost-price matching principle. The cost of a commodity around it, plus expenses, plus expected profits, constitutes the price of the commodity. This should be a general principle. 2. As a monopoly commodity, the monopolist holds the right to speak and price. However, in the process of setting prices, we should not blindly pursue profit maximization, but also consider the stability of market order, the long-term development of enterprises, long-term cooperation with partners and other factors. Some of them are even related to the economic lifeline of the country, and they must be coordinated with the country's economic policies and development plans. Therefore, there are many factors affecting the pricing of bulk commodities, which should be fair and just, taking into account the stability of the national and international economic order and the prosperity and development of the market. 3, the principle is that in a competitive world, who is strong and who is weak is the principle, and the weak can only look for some charity in the pity eyes of the strong. The advanced feature of capitalism is to virtualize or securitize all commodity transactions. Several established western trading places have controlled the trading volume of most commodities in the world, forming a market reference. The supply and demand sides will arrange supply and demand according to this market price, and the price is thus formed. Therefore, it can be said that the western countries headed by the United States hold the pricing power, and the countries of origin and demand have no pricing power at all. New york futures are very influential and play a leading role in the world. Under the principle of "one price", the prices of other exchanges will not be different.