The deduction message sent by Lianfa is received by the front-end machine of UnionPay in the postal core system. Check with unionpay. It may be UnionPay online payment and UnionPay batch collection. Or consult a specific bank. If you find that the bank card bill is pre-consumed by the bank, you can call customer service to inquire about the situation. In most cases, it is because of the automatic repayment binding between bank cards and debit cards. If the credit card repayment lags behind, it will lead to the prepayment of UnionPay credit card. It is recommended to change a bank card to avoid extra consumption.

UnionPay front-end consumption refers to the real-time transaction consumption behavior issued by China UnionPay to deal with online transactions between banks.

UnionPay front-end system is a system that used to handle the exchange business between banks and UnionPay. It is mainly responsible for the message format conversion between intra-bank systems (such as intra-bank channel front-end, intra-bank exchange platform and intra-bank ESB system) and CUPS (UnionPay exchange system), and at the same time, it deals with transaction anomalies to ensure the integrity and data consistency of online transactions.