Stock T+0 is a securities (or futures) trading system. On the day when securities (or futures) are traded, the trading system that handles the settlement and delivery procedures of securities (or futures) and prices is called T+0 trading.
Securities (or futures) bought that day can be sold that day. T+0 trading has been implemented in China's securities market because it is too speculative, in order to ensure the stability of the securities market.