website answers — on 2026-08-05 we requested the stated address and the server answered
Historical tea company since 1923; 5 generations of the Du family; specialization in Lishan, Dayuling and Huagang; own factory 華剛製茶廠.
official website confirmed (cftea.com.tw); founded in Fengyuan; ancestor Du Fulai migrated from Fujian in 1918; brand 華剛茶