1. Philatelic 72/23/1/125 Reference (shelfmark): Philatelic 72/23/1/125 Title: The People's Republic of China Postage Stamp Issue: Tree Planting Day Scope & Content: Stamps designed by Sun Jingzhong. Manufactured by the Beijing Postage Stamp Printing Works using a photogravure printing process. Collection Area: Philatelic Collections Languages: English Date Range: 12 Mar 1990 Extent: 4 Items