2. Trading methods: bidding trading, block trading, after-hours pricing trading and other trading methods recognized by China Securities Regulatory Commission.

3. The trading hours of the North Exchange are from Monday to Friday. The exchange is closed on national statutory holidays and closed days announced by the exchange. In case of bidding, the opening bidding time is from 9: 15 to 9:25, and the continuous bidding time is from 9:30 to 1 1:30, 13:00 to 14:57.

Four. The stock price is subject to price limit, and the ratio of price limit is 30%. (Note: There is no price limit on the first day of stock listing and trading and the first day of delisting consolidation period)

I. About declaration

1. declaration time: the time for the exchange to accept the bidding declaration of trading participants is 9: 15 to 9:25, 9:30 to1:30, 13:00 to15 every trading day. During the opening phase of call auction and the closing phase of call auction from 9:20 to 9:25 every trading day, the trading host of this Exchange will not accept cancellation of declaration; At other times when the declaration is accepted, the unfinished declaration may be revoked. The exchange may adjust the time for accepting the declaration.

2. Types of declaration There are two types of declaration: limit declaration and market declaration. (Unless otherwise specified)

Two, accept the following types of market declaration:

(a) the counterparty's optimal price declaration, that is, the counterparty's optimal price is the declared price when the declaration enters the trading host; If the counterparty fails to declare, the declaration will be automatically revoked;

(2) our best price declaration, that is, when the declaration enters the trading host, our best price is used as its declared price; If we don't declare, the declaration will be automatically revoked;

(3) The declaration of the remaining real-time transactions in the first five stalls is cancelled, that is, the transaction is declared at the counterparty's price in turn within the first five price ranges of the counterparty, and the remaining unfinished parts are automatically cancelled;

(4) The best five real-time trading residual limit declaration, that is, within the best five price ranges of the counterparty, the counterparty price is declared in turn, and the remaining unfinished part is converted into a limit declaration according to the latest transaction price declared by us; If there is no deal in this declaration, it will be converted into a limit declaration according to our best price; If we don't declare, the declaration will be revoked;

Note: the market price declaration is only applicable to the transactions during the continuous bidding period of securities with price restrictions. During the opening of call auction, the closing of call auction and the temporary suspension of trading, the trading host does not accept the market price declaration.

Three. Market price declaration should take price protection measures. The declared transaction price for buying declaration and the declared price for transfer limit declaration shall not be higher than the buying protection limit, and the declared transaction price for selling declaration and the declared price for transfer limit declaration shall not be lower than the selling protection limit. Buying protection price limit refers to the highest buying price that investors can accept, and selling protection price limit refers to the lowest selling price that investors can accept. The price limit declaration instruction shall include the securities account number, securities code, marketing unit code, identification code of the securities business department, trading direction, declared quantity, declared price, etc.