Can I check the balance of the inter-bank card through the ID number inside the postal service?

You can't. The Postal Savings Bank needs to provide the original ID card, bank card number and other information to inquire about the balance of the inter-bank card, so the Postal Savings Bank cannot inquire about the balance of the inter-bank card through the ID card number. China Postal Savings Bank can be traced back to the postal savings business started in 19 19, and it has a history of one hundred years. In March 2007, on the basis of reforming the original postal savings management system, Postal Savings Bank of China Limited was formally established.