Before 20 12, most of the automatic ticket vending machines in subway stations were coins, and some ticket vending machines only recognized coins, but they could not buy one-way tickets with paper money. When buying a one-way ticket, it can only be idle most of the time, which greatly affects the use of passengers. Therefore, since 20 12, the rail transit construction management company has asked the automatic ticket checking system to add the change function of banknotes.
The seemingly small change from collecting coins to buying one-way tickets and then changing paper money has solved the problem that the automatic ticket vending machine has not been fully utilized for a long time and reduced the manual input of the ticket window.