Process: first open an account in a futures company, and then go to the bank to open a "silver transfer" between a card and a futures account. Only above 500,000 can stock index trading be started. Now you can log in to your account to buy and sell stock index futures. If you think it will go up, buy it. (You can buy first and then sell, and buy and sell at any time. You can sell it one minute and buy it back the next. Anyway, you have a high degree of freedom and don't have that many stocks.