History of Hainan (Qinghai)
Hainan Tibetan Autonomous Prefecture formerly known as Tsolho Tibetan Autonomous Prefecture is an autonomous prefecture of northeastern Qinghai Province in Western China. The prefecture has an area of 45,895 square kilometres (17,720 sq mi) and its seat is located in Gonghe County. Its name literally means “south of (Qinghai) Lake.”
Source From: https://en.wikipedia.org/wiki/Hainan_Tibetan_Autonomous_Prefecture