How does the letter movement relate to Ledong Health Micro-binding?

. The application software Le Tong cannot bind the bank card. Only bound bank cards can be added to the application. First, bring your ID card and bank card. Go to the business window of the issuing bank to go through the formalities of binding the bank card. Is to bind the bank card to the mobile phone number. It needs to be handled face to face with the bank staff. I still need my signature. After the binding is completed. Bank cards can be added to Le Tong.