All electronic invoices will be locked. According to the display of Tianjin Taxation Bureau in State Taxation Administration of The People's Republic of China, if the usage of all-electronic invoices is not confirmed or recorded, the corresponding all-electronic invoices will be locked after the drawer initiates the red-letter process, and the payee may not confirm the usage of the invoices again. Digital electronic invoice (hereinafter referred to as all-electric invoice) is a brand-new invoice with the same legal effect as paper invoice. It does not exist in paper form, does not need media support, and does not need to apply for collection, old invoice search and application for edition addition.