Why does Alipay only buy 3,000 funds at a time? Maybe the fund you bought on Alipay is a fixed investment fund, or maybe you only set 3000 when you set the fixed investment amount. Therefore, you can only buy 3000 yuan at a time. This quantity can be modified. You can open the Alipay homepage and manually modify the fixed investment amount. It is ok to set the quantity you think you want to buy.