If we want to discuss the technical aspects of 4 17 154804, and it's not called buying up and buying down, it's called long, short, buying and selling, estimating and scraping people's accounts in the stock market. The declaration doesn't cost money, and then it can be delivered within one day. At that time, the account was settled after the account was settled. Such an irregular system has changed a lot, and I can't give you a detailed list.