after the high-speed rail ticket is refunded, the refunded fee is returned by the same route, which means that it will be recorded in the bill.

if the ticket purchase and refund are both before the billing date, there will be an expenditure and an income in the bill, and only the handling fee needs to be returned.

if the refund is made after the bill date and there is only one expense in the bill of last month, the refund fee will be regarded as repayment income and reflected in the bill of next month.