The photo shows an exhibit at the Mt. Xumi Museum in Guyuan in southern Ningxia Hui Autonomous Region. The mountains here, which sit at a vital pass on the eastern section of the ancient Silk Road, are famous for their Buddha Grottoes, which are among the top ten most famous grottoes in China. Built over 1,500 years ago, these grottoes witnessed the spread of Buddhism through the East. [Wang Yanfang/China.org.cn]