Only the cards of the same bank can be modified (inter-bank is not allowed). According to the difference of your account share balance, the treatment methods are as follows: If the account share balance is less than 20,000, you can change your card by yourself in the online transaction "Bank Card Management"; If the account share balance is greater than or equal to 20000, you need to mail four documents to replace the bank card. The required materials are as follows: 1, a copy of my ID card (double-sided in the new version), and handwritten ID number, name and contact number in the blank; (If withdrawal of redemption money is involved, the words "Please withdraw redemption money after modification" should also be marked. 2. A copy of the bank card, and write the bank card number in the blank; 3. The original card loss report certificate or replacement card certificate issued by the bank (the replacement card certificate must be printed) must be stamped with the bank business seal or official seal (any seal that can represent the business outlets can be used). 4. Open-end fund account business application form.