Can the social security card of Nanjing Bank be replaced by that of China Construction Bank? Is it safe?

Yes, it's safe. The social security card of Nanjing Bank can be replaced by that of China Construction Bank. If the cardholder needs to change the correspondent bank, he should first go through the account cancellation procedures at the original social security card issuing bank and withdraw the balance of the personal financial account of the original social security card. The original social security card was recovered and destroyed by the issuing bank. The cardholder finally applies to the newly selected correspondent bank. After the new social security card account is established, the balance of the original social security card medical insurance account will be automatically transferred to the new social security card. China Construction Bank is one of the largest banks in China. It has a security system, so it is safe.