The warehouse quota shall be subject to the following basic system: 1. In different stages of the trading process, different warehouse limits are applied to contracts in a certain month, and the contract warehouse limits in the delivery month are strictly controlled. 2. Control market risk by limiting the positions of members and customers. Among them, members of futures companies are limited in proportion, and non-futures company members and customers are limited in amount. 3. Hedging trading positions shall be subject to the examination and approval system. The same customer has multiple trading codes among members of different futures companies, and the total number of all positions in each trading code shall not exceed the position limit of one customer. Before the closing of the last trading day of the first month before the delivery month, the speculative positions of all members and customers in nickel futures contracts at each member shall be adjusted to an integer multiple of 6 lots (in case of special market conditions, it may be postponed for one day). After the delivery month, the speculative position in the nickel contract should be an integer multiple of 6 lots, and the newly opened position should also be an integer multiple of 6 lots.