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.

HK050.03

Country / Post Hong Kong (PRC)
Date of Issue 25 November 2003
Primary theme Environment & Conservation
Minerology & Geology
Subject World Heritage in China - Mount Huangshan
Width 38.5 mm
Height 47.0 mm
Denomination 2.50 HKD
Number in set 6 (show set)
Layout/Format sheet of 25
Perforations 13 by 13
Stamp issuing authority Hongkong Post
Printer Cartor Security Printing, France
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