Price priority and time priority are implemented in stock trading: during the continuous bidding period, because many investors may buy and sell the same stock at the same time, the exchange has formulated the principle of "price priority and time priority". If the current price of a stock is 5.66 yuan, if investor A enters the purchase price of 5.66 yuan and investor B enters the purchase price of 5.67 yuan at the same time, investor B's declaration takes precedence over investor A's declaration ... If the purchase prices declared by everyone are the same, the transaction will be made first. The same is true for selling stocks. If the current price of a stock is 5.66 yuan, A enters the selling price of 5.66 yuan, and B also enters the selling price of 5.65 yuan, then B's declaration takes precedence over A's declaration. If both parties enter the same selling price, then whoever declares first will make a deal first. This situation is more prominent when the share price of a stock suddenly rises sharply or suddenly falls sharply.