The first two represent years, and the last two represent months, indicating that the expiration date of the contract is 20 10 1 month, and so on. The closer the contract month is to the current date, the closer to the spot price. Generally, the higher the price of the far-month contract, it is called the positive market, but sometimes it is also the opposite. Generally speaking, the price of Yuanyue is high because there are storage costs in it. When we generally buy and sell small retail investors, we should choose the contract with the largest position and volume, which is also called the main contract, so as to buy and sell at any time. When you have time, you can go to the website of Shanghai Commodity Exchange to see the rules and methods of commodity futures trading, which may be helpful to you.