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.

Stamps issued with CN020.11

  1. Cn019.11-80
    Wns Number
    CN019.11
    Country / Post
    China (People's Rep)
    Date of Issue
    April 15, 2011
    Subject
    Ancient Chinese Calligraphy - Cursive Script
  2. Cn020.11-80
    Wns Number
    CN020.11
    Country / Post
    China (People's Rep)
    Date of Issue
    April 15, 2011
    Subject
    Ancient Chinese Calligraphy - Cursive Script
  3. Cn021.11-80
    Wns Number
    CN021.11
    Country / Post
    China (People's Rep)
    Date of Issue
    April 15, 2011
    Subject
    Ancient Chinese Calligraphy - Cursive Script
  4. Cn022.11-80
    Wns Number
    CN022.11
    Country / Post
    China (People's Rep)
    Date of Issue
    April 15, 2011
    Subject
    Ancient Chinese Calligraphy - Cursive Script