You don't have to pay back the welfare money used in Alipay. Welfare money is the welfare experience that Alipay gives users. After a few days, the experience money will be automatically recovered. For example, if you use welfare money to buy a fund to receive welfare, the welfare money will be used by Alipay for free. Donated welfare money can not be consumed, but can only enjoy the benefits brought by welfare money. In addition, welfare payments cannot be transferred out or paid online. However, after the end of the experience period, the income generated during the experience period can be transferred out.