Photo taken on April 7, 2008 shows the rubbing of one of the imprinted bricks made in Han Dynasty (206BC-220AD) collected by Kong Zhaojin in Xuchang, central China’s Henan Province. Mr. Kong has collected some 360 bricks with imprinted patterns that dated back to ancient China's Han Dynasty for more than 40 years. (Xinhua Photo)

Kong Zhaojin shows the rubbings of his collection of imprinted bricks made in Han Dynasty (206BC-220AD) in Xuchang, central China’s Henan Province. Mr. Kong has collected some 360 bricks with imprinted patterns that dated back to ancient China's Han Dynasty for more than 40 years. (Xinhua Photo)