West Sea County Site

　　West Sea County Site, which was built in Xihan Dynasty (about 4 AD) is located 1km away from northwest Haiyan County seat and 90km away from Xining City. Since foundation, the ancient county was already part of Chinese territory. Nowadays, large amount of ancient coins and money are found in archaeological excavation, like Wuzhuqian, Huoquan, Daquan of the Western Han Dynasty ; Mingwen Wadang of Eastern Dynasty; Lianhuawen Wadang of the Tang Dynasty and Shengsong Yuanbao of the Song Dynasty.