![China's top 10 archaeological finds of 2017 (8/11)](http://www.ecns.cn/hd/2018/04/11/31d484f015a54bf48a40c445194b6065.jpg)
Excavation of the Yaoheyuan Ruins in Pengyang County of northwest China's Ningxia Hui Autonomous Region showed that this region might have been under the imperial rule of Chinese emperors much earlier than archaeologists previously thought. (Photo/Xinhua)