The World Association for the Development of Philately (WADP) and the Universal Postal Union (UPU) jointly conceived and developed the WADP Numbering System - WNS, which was launched on 1 January 2002.

CN041.11

Country / Post China (People's Rep)
Date of Issue 25 May 2011
Primary theme Science & Technology (Famous scientists)
Astronomy & Space (Space)
Subject Scientists of Modern China (V) - Qian Xuesen
Width 40.0 mm
Height 30.0 mm
Denomination 1.20 CNY
Number in set 4 (show set)
Layout/Format sheet of 20
Perforations 13 by 13
Stamp issuing authority State Post Bureau China National Philatelic Corporation
Printer Beijing Postage Stamp Printing House