Trading seats originally refer to the seats in the lobby of the exchange, where there are communication devices such as telephones, through which brokers can transmit trading and trading information. Securities companies must purchase seats before participating in securities trading, and seats can only be transferred and cannot be revoked after purchase. If you have a trading seat, you are qualified to trade securities in the trading hall. With the continuous development of science and technology, the trading mode has changed from manual bidding mode to computer automatic matching mode, and the form of trading seats has also changed greatly, gradually evolving into a computer quotation terminal connected with the exchange matching host. 1. Marketing Department of Shanghai Stock Exchange. According to the relevant regulations of the Shanghai Stock Exchange, if members and institutions recognized by the Shanghai Stock Exchange want to enter the Shanghai Stock Exchange market for securities trading, they should apply for trading rights from the Shanghai Stock Exchange in addition to applying for corresponding seats, and become trading participants in the Shanghai Stock Exchange.

Trading participants shall conduct securities trading through the trading participant marketing unit that applies for opening an account in the Shanghai Stock Exchange. Participants' marketing units refer to the basic units that trading participants enjoy and exercise relevant trading rights and accept the management of relevant trading business of Shanghai Stock Exchange through their participation in securities trading of Shanghai Stock Exchange. Therefore, the marketing unit is the technical carrier of trading authority. Through the marketing unit, the management of members' participation in transactions and membership rights is realized.

2. Marketing Department of Shenzhen Stock Exchange. It refers to the basic business units that members of a stock exchange apply to the stock exchange for establishment, participate in the securities trading of the stock exchange, and accept the supervision and service of the stock exchange after obtaining seats.

In 2006, the Shenzhen Stock Exchange was reviewed and approved by the 12 session of the board of directors, and issued the Detailed Rules for the Administration of Seats and Marketing Units of Shenzhen Stock Exchange. After the implementation of the detailed rules, the Shenzhen Stock Exchange will switch the specific trading authority of the original seat to the marketing unit at one time, and its coding and trading status will remain unchanged. The transaction management, information release and other business processing of the original seat of Shenzhen Stock Exchange will be transformed into the corresponding business processing of the marketing unit.