The market order refers to the transaction at the best price that can be executed at present without specifying the price.

But specific to each exchange, the role of the market price list is different. For example, there is no market order in the early stage, and the market order of Zhengshang takes precedence over the limit order when trading. CICC's market order can only be traded with the limit order, and the transaction price is equal to the limit price of the immediate optimal limit order.

For specific transactions, you can check the rules of each exchange.