What is the reason why China Unicom electronic invoice cannot be printed?

According to the information you provided, if you are unable to issue an electronic invoice by yourself through online channels, there are generally the following situations: 1. Your number is in abnormal status such as arrears, blacklist, etc., and needs to be restored to normal status before it can be issued; 2. You have already issued paper invoices and can no longer issue electronic invoices; 3. The amount that can be issued for invoices has been exceeded. After exceeding the limit, electronic invoices cannot be issued. Please go to China Unicom's own business hall to print the original paper invoice; 4. Users who recharge through third-party channels (such as WeChat, Alipay, Haoyi, air recharge, etc.) should consult the third party to receive the invoice. If the above situation remains unresolved, it is recommended to contact China Unicom customer service in the place where the number belongs to find out.