Why do some water cards get property to buy water?

No way! There are two water charge cards. I can understand that one is for the property to collect water charges, and the other is the water charge card issued by the water company. In other words, it turned out to be a water company card. Later, in order to facilitate the decentralization of management authority, banks can charge water fees, and residential properties can also charge water fees. Therefore, it is not surprising that you have two water fee cards.