What is "jinghong"

Jinghong (; Dai / Tai Lü: , pronounced ; , ; ; also formerly romanised as Chiang Hung, Chengrung, Cheng Hung, Jinghung, Keng Hung, Kiang Hung and Muangjinghung) is a city in and the seat of Xishuangbanna Dai Autonomous Prefecture, in the far south of China's Yunnan province, and the historic capital of the former Tai kingdom of Sipsongpanna.