The failure in invoicing may be due to the prompt that the offline invoicing amount has been exceeded during invoicing.

This means that the invoice you issued has not been uploaded to the tax bureau’s system. At this time, you can check whether your network connection is normal, or there may be a problem with the server at the tax bureau. After the computer is connected to the Internet or the tax bureau's server is in normal use, wait for the invoice data to be automatically uploaded and try again. This means that the invoicing software cannot be opened, or the window for not paying taxes on time is locked. CNOOC invoices cannot be reissued, but the stubs can be copied and stamped with a special tax stamp, and the copy and instructions can be used as invoices.