Written records of the history of China can be found from as early as 1200 BC under the Shang dynasty (c. 1600–1046 BC). Ancient historical texts such as the Records of the Grand Historian (ca. 100 BC) and the Bamboo Annals describe a Xia dynasty (c. 2070–1600 BC), which had no system of writing on a durable medium, before the Shang.