T stands for Transaction, which means transaction, buying and selling. 0 represents the number of days. T+0 simply means that you can buy and sell multiple times in both directions on the same day.

my country’s bonds, bond exchange-traded open-end index funds, exchange-traded money market funds, gold exchange-traded open-end securities investment funds, cross-border exchange-traded open-end index funds, cross-border listed open-end funds, warrants, and those approved by the China Securities Regulatory Commission Other varieties (the cross-border exchange-traded open-end index funds and cross-border listed open-end funds mentioned in the preceding paragraph are limited to open-end funds that track index component securities or investment targets that are subject to same-day reversal trading, and B-shares are subject to the next trading day) Reversal transactions) all implement T+0 transactions on the same day.