Because the invoices were bought one by one when they were bought, now they are just one for you, and that one has not been opened yet, and it has not been handed over to the tax bureau. It is impossible for the tax bureau to know the amount invoiced by a company at the same time when it has finished issuing invoices. Only when the company has used up the whole invoice, and then goes to the tax bureau to check the old one for the new one, the tax bureau will display its old check date and invoiced amount, so when you inquire, it will display its purchase date, invoice number, invoice code and company name. It means that this invoice is true.