The most correct answer (take Shenzhen as an example): show your ID card, go to Neptune Star Health Pharmacy, fill in the membership application materials and pay the 2 yuan fee. On Neptune Star Membership Day on 8/ 18/28 every month, members can enjoy a 15% discount (in addition to red labels and special prices, there are also gifts) and bonus activities, and participate in activities such as senior clubs and health club members. All chain stores can use it (Shenzhen only).