First, open the idle fish app, you can search for a health card on the idle fish homepage, and then choose one you like to buy. Idle fish is the App client of Alibaba's idle fish trading platform (iOS and Android versions). As long as members use Taobao or Alipay account to log in, they can realize many functions, including one-click resale of personal Taobao account "Bought Baby", taking photos of their mobile phones and uploading second-hand idle items, online transactions, etc., without complicated shop opening procedures.