Category: Chinese Stamps ■ Description Issued July 5, 1929. Printed by the Beijing Ministry of Finance Printing Bureau. Airplane flying over the Great Wall (2 out of 5 types) There are Beijing 1st edition and 2nd edition, the 2nd edition has the Blue Sky White Sun flag on the airplane's wings. Sales were discontinued on December 31, 1936. Use was prohibited from February 1, 1937. ■ Condition There is discoloration of the paper and hinge marks due to aging. (Please check the front and back photos for details.)