Prepaid bills are not automatically closed. In general, prepaid bills are for profit-taking or stop loss. If you open a position, you can just send a commission directly.

Open positions will freeze funds.

Your frozen fund is 1307.2 yuan, which means that the margin is 8%, which varies from futures company to futures company, but 5% of the margin is collected by the exchange.

If it is speculation, it is necessary to choose more active varieties. For corn, it should be 0805 now.