Yes, you can charge into Alipay first, and then you can top up the phone bill. Domestic electronic cash is basically available.

The full name of electronic cash (E-cash): Electronic cash. Also known as electronic money (E-money) or digital currency (digital cash), it is a very important electronic payment system. It can be regarded as an electronic or digital simulation of real currency. Electronic cash is represented by digital currency. Information exists in the form of information and circulates through the Internet. But it is more convenient and economical than real money. Its simplest form includes three subjects: merchants, users, and banks; and four security protocol processes: initialization protocol, withdrawal protocol, payment protocol, and deposit protocol. The first electronic cash solution was proposed by Chaum in 1982. He used blind signature technology to realize it, which can completely protect the user's privacy. However, this completely anonymous electronic cash also provides convenience for many criminals. They use the complete anonymity of electronic cash to conduct some illegal and criminal activities, such as corruption, illegal purchases (such as the purchase of drugs, arms, etc.), extortion, etc. Even if the police get the stolen money, they cannot catch the criminals. For this reason, a reasonable electronic cash system should be incomplete or conditionally anonymous. In 1995, Stadler et al. proposed the concept of fair blind signature, which can be used in conditionally anonymous payment systems. In 1996, Camenisch et al. and Frankel et al. independently proposed the concept of fair off-line electronic cash for the first time, and provided two solutions. User anonymity in fair e-cash is incomplete and can be revoked by a trusted third party (TTP), thereby preventing criminal activities that exploit the complete anonymity of e-cash.

Electronic cash is a relatively mature electronic payment method, suitable for small transactions that are paid through the Internet.