Jingdezhen's porcelain has been famous not only in China but in time it became known internationally for being "as thin as paper, as white as jade, as bright as a mirror, and as sound as a bell". The late Guo Moruo, a senior official who was also a famous historian and scholar of PRC wrote a poem that says (in translation): "China is well known in the world for its porcelain, and Jingdezhen is the most well-known centre, with the highest quality porcelain in China". 　　Most Jingdezhen porcelain is valued by collectors of antique porcelain throughout the world. According to media reports, a blue and white porcelain jar produced in Jingdezhen during the Yuan Dynasty was auctioned for the equivalent of RMB 230,000,000 yuan in London, UK on July 12, 2005. This was the highest price achieved by a piece of porcelain in the history of all porcelain auctions of the world. The reason for the high price is experts believe that the blue and white Yuan Dynasty porcelain has a dominant position in the history of Chinese ceramics. It represents the pinnacle of the development of Chinese blue and white porcelain.