Postal savings bank is booming day by day. According to Cai Xi's survey. Com, the money fund is an open-end fund with extremely low risk, and all of them are legal products approved by the CSRC. Alipay is only a sales organization and does not worry about running away or going offline. Monetary fund is an open-end fund that collects idle social funds, is operated by fund managers and kept by fund custodians. Special investment in risk-free money market instruments, different from other types of open-end funds, has the characteristics of stable income, high security, high liquidity and "quasi-savings".