Multi-position closing is a selling action, which will only close the position with the buyer. Instead of "placing a new empty order", because "opening a new empty order" is a selling action. At this point, your understanding is wrong.

The buying action referred to here is either due to the opening of a new order or the liquidation of the original selling order (buying liquidation action).

Without the buyer, the seller's transaction cannot be completed; or vice versa, Dallas to the auditorium From the perspective of the whole market, there are as many orders as empty orders at any time.