Haidong is a prefecture-level city of Qinghai province in Western China. Its name literally means "east of the Lake." On 8 February 2013 Haidon…Haidong is a prefecture-level city of Qinghai province in Western China. Its name literally means "east of the Lake." On 8 February 2013 Haidong was upgraded from a prefecture into a prefecture-level city. Haidong is the third most populous administrative division in Qinghai after Xining and Golmud.