Why should I send 205 messages to China Unicom when handling industrial and commercial bank cards?

Deal with an industrial and commercial bank card and send a 205 message to Unicom, which is to inquire whether Unicom's mobile phone number has been cancelled.

If you cancel, you need to apply again.

Banks are legally established financial institutions engaged in monetary and credit business, and are the product of the development of commodity monetary economy to a certain stage.

Banks are one of the financial institutions. Banks are divided into central banks, policy banks, commercial banks, franchised institutions, investment banks and the World Bank, with different responsibilities.

The central bank, China People's Bank, is the central bank of China.