Gold extension means that gold T+D adopts the system of matching transaction, with daily limit. During this period, the daily limit was 10%. Two-way trading, both ups and downs can be profitable, trading time is 10 hour every day, and there is no late trading on Friday. Gold futures is a kind of futures. Like other futures, it only has a few hours of trading time every day, and it is a two-way transaction. There is no discount for being late. Spot gold combines the characteristics of futures, with 24-hour trading and two-way trading.