이풍
From December 5–8, 2003 a Chinese scientific inspection group of about 15 scientists was formed to investigate the stone. Some of the more notable members include Li Ting-dong (李廷栋) from Chinese Academy of Sciences, Liu Bao-jun (刘宝君) from Chinese academy of Sciences and Li Feng-lin (李凤麟) from China University of Geosciences. The stone was analyzed and determined to be about 270 million years old, with a likely provenance in the Permian period. Other researchers included Li Feng-lin (李鳳麟) and Gu Jing-yi (賈精一).