G mainly fund seats;

A is generally an ordinary seat in the securities business department;

T is social security, insurance or QFII, which belongs to institutional seats. Generally, the seat of self-operated business of securities firms is T, which is strictly distinguished from brokerage business.

Institutional seats refer to the special channels and seats for institutional investors to buy and sell securities, such as special seats for funds, self-operated seats for brokers, special seats for social security, special seats for financial management of brokers, special seats for insurance institutions, seats rented by insurance institutions, and special seats for QFII.