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.

CN020.11

Country / Post China (People's Rep)
Date of Issue 15 April 2011
Primary theme Literature, Press and Comics (Calligraphy)
Subject Ancient Chinese Calligraphy - Cursive Script
Width 38.0 mm
Height 50.0 mm
Denomination 1.20 CNY
Number in set 4 (show set)
Layout/Format sheet of 12, 8
Perforations 13 by 13.5
Stamp issuing authority State Post Bureau China National Philatelic Corporation
Printer Beijing Postage Stamp Printing House