I was studying in a boarding school in Nanjing, and I went home every weekend by metro. In every metro station, there are two to four vending machines with food and drink. While I was waiting for the metro, I found that few people bought things from vending machines. I thought it was because of the price, but once my friends and I bought some water there, I found that the price is almost the same as sold in supermarket.

In Nanjing, people can buy a kind of transportation card called Jinlingtong which can be used to take bus, metro, taxi and some other kinds of transportation. If this card is able to be used on vending machines, I believe, the sales will increase. Some people need to catch the subway. So, they will find that opening their bags, looking for wallets and then taking out the money are troublesome. And people need to put the change back to their wallets if the value of the money they use is too much. At the station, some people hold the transportation card in their hand in advance. Using the card is much more convenient and time-saving. This way can benefit both the consumers and the owner of those vending machines.