Brother, have you made a commission account? If not, make one, you can save a lot, for example, the principal is 2000u, open 20 times, the order is 40,000u, buy 20u, sell 20u, a total of 40u, if there are 3 orders a day, the daily handling fee is 120u, calculated at 20%, a month after the return to you is hundreds of u, permanent and valid