The tomb on Tuerji Hill is of the early period of Liao Dynasty and was presumably built sometime around A.D.920.The deceased there appears to be imperial family judging from the high quality of the burial accessories.This discovery is counted as one of the 10 major discoveries of China in 2003.Institute of Cultural and Historical Relics and Archaeology Inner Mongolia Autonomous Region and Kyushu National Museum have restored the wooden casket for conservation and conducted scientific research from 2007 to 2010 while receiving a research grant from the foundation.This turned out to be epoch-making project in that it was carried out through joint efforts by Japanese and Chinese engineers for the national treasure in China.It is important to the future international collaboration that the jointly executed practical work by Japanese and Chinese researchers to preserve the cultural assets was able to show the fruits of the personnel training and technology transfer in specific terms.