Hongyin Tuocha, the first printing-grade tea produced by Xiaguan Tea Factory in the early 1950s, at the beginning, the " Zhong Cha brand" (中茶牌) trademark product used the red word " Zhong" ( 中) in the outer circle, and the word " Cha " ( 茶) in the middle was printed in red, so it was called " Hongyin" by tea lovers in the tea market.