How to use Sishui Hualian membership card?

Look at the lower left corner. If you write a red "membership card", there is no money in it. It's just a point card that accumulates points after each consumption. If you have more points, you can participate in activities or exchange them. If it is written in small gold letters like VIP in the lower left corner, it is generally rich. Look at the small label on the back, which says face value and can be used as money.