China's futures exchanges generally have the following provisions on the position limit system: the exchange can determine the position limit amount of each variety according to the specific conditions of different futures varieties; Control market risk by combining the restriction of members' positions with the restriction of customers' positions; Hedging trading positions are subject to examination and approval system, and their positions are not restricted; When the same customer opens positions in different futures company members, the total positions in a contract shall not exceed the position limit of the customer; The number of positions held by members or customers shall not exceed the prescribed position limit.