
The book is titled "A History of Xinjiang Hotan Jade Mining," by Yu Ming, head of the Hotan Jade Trading Association of Xinjiang.
One observation from the article: "...prices for the precious stone have gone through the roof in recent years." Yu's research was mainly historical but he also adventured to remote sites: "We had to wade through rivers, climb cliffs and sleep in the open," says Yu.
Xinjiang an autonomous territory in northwest China, is a vast region of deserts and mountains. It is home of many jade merchants.