You can't apply for a security code in online banking. According to relevant public information, according to the notice of relevant national documents, all branches of the People's Bank of China have stopped the issuance and annual review of loan cards, and renamed the original loan card code as China symbol code. Regarding the application for China identification code, enterprises and individuals who have established loan cards do not need to issue China identification code when making loans. Enterprises and individuals who have not applied for loan cards may submit their credit code certificates, organization code certificates, industrial and commercial registration certificates, tax registration certificates or valid personal identification documents to financial institutions, and distribute them with levy codes.