The electronic invoice of the maintenance fund was red-ticked. It was because of some reasons that the wrong invoice was issued and a correct invoice was re-issued. Red-ink invoice is an early invoice. For some reason, if there is an error, it is necessary to re-invoice. Before re-issuing, the invoices issued in the previous period should be flushed. Therefore, red-ink invoices, also known as red ink, are used to offset accounts.