在冀东的卢龙县与青龙县交界的群山中,大量的沉积岩内夹着层层像一沓厚纸一样的岩石。这种层状岩石是一种高级装饰石材,最早采用这种装饰材料的是人民大会堂和南京长江大桥桥头堡。它那天然细腻的花纹和柔和美丽的色彩,任何一种天然石料都无法比拟。这就是“迭层石”。 In the mountains bordering Lulong County and Qinglong County in the eastern part of Jidong, a large number of sedimentary rocks contain rocks like layers of thick paper. This kind of layered rock is a kind of high-grade decorative stone. The earliest use of such decorative materials was the Great Hall of the People and the Nanjing Yangtze River Bridge Bridgehead. Its natural delicate patterns and soft and beautiful colors are unmatched by any kind of natural stone. This is the “layered stone.”