What's wrong with China Mobile's electronic invoice?

The reason is that the inventory of invoices in this business hall is insufficient, and the reason is that electronic invoices have been separated for one year. Because electronic invoices need to be collected from the tax department in the business hall, once the invoices are insufficient, they cannot be issued. Users can make an agreement with the business hall and wait until there is an invoice. The second kind of invoice was issued that year, but it could not be issued the next year.

You can write it down first and issue the invoice another day.