Not necessarily. Most of them are main contracts, mainly because of large turnover, good liquidity and easy realization of profit and loss. But some people do long-term inactive contracts. For example, the daily limit of the main contract in recent months, you can look at the relevant far-month contracts. If there is no daily limit, you can try to buy. In short, look at personal trading methods and ideas. Some long-term bulls will buy forward contracts and hold them for a long time.