when a stock has the following situations, it will be considered that its trading is in abnormal fluctuation:

1. The deviation value of the daily closing price of a stock has reached 2% in three consecutive trading days, and the ST and *ST specially treated before 211 are 15%, which is now corrected to 12%.

2. A stock has been listed as "public information of stocks and funds" for five consecutive trading days.

3. The amplitude of a stock price reaches 15% for three consecutive trading days.

4. The average daily turnover of a stock increased by 5% for five consecutive trading days.

5. Other circumstances that the stock exchange or the China Securities Regulatory Commission consider as abnormal fluctuations.

Abnormal stock fluctuation refers to the fact that the stock price deviates from the normal range and will be recognized as abnormal fluctuation by the exchanges, and this recognition standard is different from exchange to exchange. Compared with Shenzhen Stock Exchange of Shanghai Stock Exchange, the restrictions on abnormal fluctuation will be looser. When a stock is in abnormal fluctuation, in order to avoid the instability of the stock and cause heavy losses to investors, the stock exchange can stop trading.

in the case of the above, Article 1 to Article 4, the calculation of abnormal fluctuation will be restarted from the date of announcement. When a listed company suspends trading due to holding a general meeting of shareholders and publishing regular reports, the calculation of its abnormal fluctuation will start again from the date of stock resumption.

1. Individual investors only need to meet two conditions to participate in the subscription of new shares in the North Stock Exchange market and transactions in the secondary market:

(1) The daily assets in the securities account and capital account are not less than RMB 5, in the 2 trading days before the application authority is opened.

(2) Having participated in securities trading for more than 24 months.

investors need to sign a risk disclosure statement when opening an account in Beijing Stock Exchange. The trading authority of investors who have opened the selective trading authority before the opening of Beijing Stock Exchange will be automatically transferred to Beijing Stock Exchange, and the trading authority will be automatically extended to the innovative stocks, without the need for investors to apply separately. However, investors should pay attention to the fact that the entry threshold for basic funds is still 2 million yuan. In addition, investors should deposit the subscription funds into their accounts before making a new subscription at the North Exchange to avoid payment failure.

2. The shares of the North Stock Exchange can be traded by bidding, block trading and agreement transfer. The main trading rules are as follows:

(1) There is no limit on the price of shares on the opening day of the North Stock Exchange, and the price of newly issued shares is limited to 3% from the next day;

(2) The North Stock Exchange has set up a stock suspension system, and there is no price limit on the opening day, and a temporary stock suspension body is implemented;

(3) Consumers who have already opened the administrator's authority on the select floor of the New Third Board will be automatically upgraded to have the account and transaction administrator's authority of the North Exchange without operation;

(4) If the business scale of each application is not less than HK$ 1 billion or the transaction volume is not less than HK$ 1 million, spot trading of bulk commodities can be conducted;

(5) During the continuous bidding period, the effective price range of the reference price application is set at 5% above and below the standard price, and the reference price guarantee system is adopted for the market price application.