First Day Cover
首日封
Sobrescrito de 1.º Dia
ChinaHetian Jade
Date of Issue : 28 August 2012
4-1 : Jade Bixie Warding off Evil
4-2 : Jade with Characters "Chang Le" and Grain Patterns
4-3 : Jade Wine Cup with Two Ears on a Golden Silver
4-4 : Jade Elephant with Two Cleaning Kids on its Back
Hetian Jade comes from Hetian in the Kunlun Mountains in Xinjiang. It is divided mainly into five categories according to color: yellow, white, blue green and dark green. First used in the late Neolithic Period, Hetian Jade entered the central plains during the Yin and Shang dynasties (1600 BC - 1046 BC) and gradually became the main source of jade for later dynasties.
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