1. A continuous contract is not a specific contract, but a change. For example, "XX losing streak" is a contract in the current delivery month, "XX losing streak" is the first trading contract after the current delivery, "XX losing streak" is the third trading contract after the current delivery, and so on. Because most futures contracts have a delivery period, usually the longest contract period does not exceed one year. In order to facilitate research, many quotation systems have set up "continuous contracts".

2. A monthly contract refers to a monthly delivery contract.

Delivery is the settlement of funds between investors and securities companies in the settlement process. Except for B-shares, the securities (A-shares, funds and bonds) listed and traded in Shanghai and Shenzhen stock markets all implement the T+ 1 delivery system. T+ 1 system means that the stocks bought on the same day cannot be sold on the same day, and the funds can only be received and delivered on the next business day of the trading day, and the cash cannot be withdrawn from the account on the same day.