工夫紅茶
↑ Daily Life in 18Th-Century England - Page 238 Kirstin Olsen - 1999 "緑茶の珠茶や紅茶のペコのような味の濃い茶は概して味の薄い熙茶や花茶とブレンドされる。工夫茶は最もポピュラーな茶であった。すなわち安く最も大衆向けの武夷岩茶は...。」
↑ The Penny magazine of the Society for the Diffusion of Useful Knowledge - Volume 9 - Page 75 Charles Knight, Society for the Diffusion of Useful Knowledge (Great Britain) - 1840 "Congou, the next in quality to 正山小種, is called by the Chinese Koong-foo (" labour — assiduity"), and consists of a careful selection of the ... Thus, Canton Bohea is a mixture of the commonest Congou with the inferior tea of the province."