shorting refers to selling the stocks at the current price in anticipation of the future market decline, and buying them after the market falls, so as to obtain the difference profit. Its trading behavior is characterized by selling first and then buying. In fact, it is a bit like the credit trading mode in business. This model can make a profit in the band of falling prices, that is, first borrow goods at a high level and sell them, and then buy and return them after falling. For example, if a stock is expected to fall in the future, it will be borrowed and sold when the current price is high (the actual transaction is to buy a bearish contract), and then it will be bought when the stock price falls to a certain extent and returned to the seller at the current price. The difference is profit.

since there is a long position, there must be a short position, just like there is a short position if there is a long position, and there is a loss if there is a win.

China stock market can't be short, because China's policy stipulates that it can only be traded in one direction, not in two directions, which is very bad, so 9 out of 1 people who enter China stock market to make money lose money.