Futures are subject to T+0 trading, and there is no time limit for trading. From the perspective of system design, futures speculation is encouraged, so there is no limit to the number of futures transactions. A lot of short-term speculation can increase the liquidity of futures, which is what the market needs, so it is not restricted.
Although there is no limit to the number of transactions, futures trading is limited. Limited position means that a single variety contract has at most one position limit, as long as it does not exceed this position limit, it can be traded normally.