Short closing refers to buying and closing a futures contract that was originally sold short. Short position refers to the increase of positions, but the added value of positions is less than the current quantity, which belongs to active selling; Long position closing refers to reducing positions, but the value-added of positions is less than the current quantity, which belongs to active selling; Short position means that the position is reduced, but the value-added of the position is less than the current quantity, which belongs to active buying.
Detailed explanation: Short position closing means that the position is reduced, but the absolute value of the position increase is less than the current quantity, which belongs to active buying. Suppose three people are counterparties, in which A has five long positions, B has five short positions and C has no position; If Party A wants to close some positions, it will sell 3 positions; Party C thinks that the market will fall and sells 2 positions; If Party B also wants to close the position, it will sell five positions at the current price (selling price), and the disk shows: empty (short), spot transaction 10, position difference -6. If it is a long position, it is to take B as the active position, and A can close the position.