China Scenic''''' Hailongtun – the Demise of a Tusi Lord: chinascenic.com (China Scenic) The site is the historic capital of Qin clan Tusi (c=覃氏土司) of Tangya, the Qin clan were the rulers of the Tangya Tusi and hereditarily governed a territory of 600 sqkm for four centuries in the modern-day Xianfeng County.