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 CN012.11

  1. Cn011.11-80
    Wns Number
    CN011.11
    Country / Post
    China (People's Rep)
    Date of Issue
    March 08, 2011
    Subject
    Liangzhu Jade Artifacts
  2. Cn012.11-80
    Wns Number
    CN012.11
    Country / Post
    China (People's Rep)
    Date of Issue
    March 08, 2011
    Subject
    Liangzhu Jade Artifacts