1. Philatelic 72/22/1/39 Reference (shelfmark): Philatelic 72/22/1/39 Title: The People's Republic of China Postage Stamp Issue: 10th Anniversary of Chairman Mao Zedong's Swim in the Yangtze River Scope & Content: Stamps designed by Ren Yu. Manufactured by the Beijing Postage Stamp Printing Works using a photogravure printing process. Collection Area: Philatelic Collections Languages: English Date Range: 16 Jul 1976 Extent: 3 Items