1. Generally, long-term refers to holding it until the month-end delivery date, while short-term refers to intraday trading or holding it for one or two days.

2. Because the futures are delivered at the end of the month, you should close your position regardless of making money or losing money, and then buy the contract for next month. Generally, the contract price will be different every month. Futures trading generally chooses short-term or ultra-short-term, which is safer and avoids unnecessary risk pressure caused by excessive fluctuations.

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