Futures 220 1 means that the futures contract will expire in June 2022, and investors can only hold the futures contract until the last trading day of June, 202 1, and the number on the futures code represents the contract expiration time.

Futures trading rules: T+0 trading, two-way trading, and no price limit, margin trading, futures trading hours: 9:00- 1 1:00, afternoon 13:30- 15:00, and night trading at 2600.