From the Wikipedia page  which gives details of the legends.
Huang Jin Gui (Chinese: 黄金桂; pinyin: huáng jīn guì) is a premium variety of Chinese oolong tea traditionally from Anxi in Fujian province. Named after the yellow golden color of its budding leaves and its unique flowery aroma, said to be reminiscent of Osmanthus.
This oolong is similar to Tie Guan Yin with only a little oxidation. Consequently, it has a very flowery, delicate aroma without the astringency of a green tea or the heaviness of a Red/Black Tea.