The reasons for Gushengtang Tongan members are: preferential treatment and discount, increasing customer stickiness and so on.

1. Offers and discounts: The membership system usually provides some offers and discounts, which can attract customers to spend and increase their willingness to spend in Gugutang.

2. Increase customer stickiness: Through membership system, Gushengtang can build customer loyalty and increase customer stickiness. Customers may be more inclined to choose Gushengtang, because they can enjoy the benefits and discounts of members and get more health services at the same time.