The He Shi Bi (Chinese: 和氏璧; pinyin: Hé Shì Bì; literally "Jade disc of He") is a piece of jade which plays an important part in many historical stories in Ancient China. Found in the State of Chu by a man named Bian He, it was first made into a jade disc, then into the Imperial Seal of China by Qinshihuang.
Read more about He Shi Bi: Discovery, "Returning The Jade Intact To Zhao", Lin Xiangru, The Imperial Seal