Opening a position is buying, whether it is long or short, it belongs to opening a position. After you open a position, you will continue to be bullish and increase your capital, that is, increase your position. When you fall again, selling part of it is lightening your position. The so-called lock position means that when you are in a slump, you are making more orders, but you are chasing empty orders to reduce losses. I am an investment consultant of Guotai Junan. You can keep asking me questions.