Locking a warehouse is not just clicking the lock button in the software. As long as a new position (contract of the same variety and the same month) is opened, it will be regarded as locking a warehouse.

Shanghai Futures Exchange, Energy Center, China Financial Futures Exchange: intraday trading, one-way margin automatically occupied.

Dalian Commodity Exchange: Lock positions are also one-way large positions, but the two-way positions held in the session occupy the margin, and the small margin will be refunded when the settlement is made after the session.

Zhengzhou Commodity Exchange: There is no discount for lock positions.

Shanghai Futures Exchange and Energy Center: After the closing of the fifth trading day before the last trading day of the contract, the above-mentioned one-way large-scale discount will be cancelled.

China Financial Futures Exchange: After the closing of the trading day before the delivery month of treasury bonds futures, the above-mentioned one-way large-scale discount will be cancelled.