Subscription and fixed investment do not affect each other, and there is no sequential relationship. If you have 20,000 yuan, you can buy it directly at one time. If you want to invest for a long time, you can choose a fixed investment, a few hundred dollars at a time, and invest for a long time every month. This is a fixed investment. After opening an account, you can directly apply for the purchase of the fund without waiting for 2 working days. Only when you redeem the fund, you need to wait 3-4 working days before the money can return to your bank account!