Empty exchange is a futures term, which means empty exchange. The standard name of an empty sink is an empty sink. Exchange refers to the transfer of orders (futures contracts) in the same direction, which can be divided into multi-exchange and empty exchange according to its nature.

Empty exchange: if the original sales order on hand is to be smooth, it must be repurchased. Someone else must have sold it at this time. If he opens a position to sell, the position in the market has not changed at this time, but the sell order has changed from my hand to his. It's called empty-handed. In short, empty-handed means that the original blank check is bought and closed, and the new sales source of the blank check is opened, and the position remains unchanged.