Stock index futures 1 min, 5 min, 10 min, 15 min and 30 min refer to different time intervals of the trading cycle. The time interval here refers to the length of each cycle of futures trading in minutes. For example, stock index futures 1 min is 1 min per trading cycle, stock index futures for 5 minutes is 5 minutes per trading cycle, and so on. At the end of each trading cycle, futures traders can make new transactions. Different time intervals apply to different traders and trading strategies. For example, a shorter cycle is suitable for short-term traders, high-frequency traders and fast trading strategies, while a longer cycle is suitable for long-term traders, long-term trading strategies and investors.