During the reign of Emperor Kangxi, an adventurer named Yu Yonghe left his home in Zhejiang Province and crossed the Taiwan Strait to locate the source of this sulfur. After traveling the length of the island, he arrived at present-day Lungfengku.
台灣入清朝版圖後，採硫活動益增頻繁，康熙年間，浙江籍探險家郁永河曾渡海來台探訪硫磺產地，行過山巔水湄，到達今日的龍鳳谷。