According to Article 55 of the Accounting Basic Work Standard of the Ministry of Finance, after registration, accounting vouchers shall be kept in the order of classification and number, and shall not be scattered or lost. Accounting vouchers should be neatly folded in numerical order together with the attached original vouchers or summary tables of original vouchers, and bound into a book on schedule, with the cover indicating the name of the unit, year, month, start and end date, voucher type and start and end number, and the bookbinder should sign or stamp outside the binding line.