Futures margin can be divided into settlement reserve and trading margin, as follows:

1. Settlement reserve is the funds prepared in advance in the exchange’s dedicated settlement account for transaction settlement. It is the margin that is not occupied by the contract. If the balance of the member's settlement reserve is greater than zero but lower than the minimum balance of the settlement reserve, the exchange will issue a "Margin Call Notice" and prohibit the member from opening new positions until the margin is replenished; if the balance of the settlement reserve is less than zero, the exchange will issue "Margin Call Notice" and "Forced Liquidation Notice", if the margin is not replenished before the market opens on the next trading day, the exchange will forcefully liquidate the member's position in accordance with relevant regulations.

2. Trading margin is the actual margin paid for holding futures contracts in futures trading. When the book balance of the margin is lower than the maintenance margin, the trader must replenish the margin within the specified time so that the balance of the margin account ≥ settlement price × position × margin ratio, otherwise the exchange or agency has the right to implement forced liquidation.