唐·甄权《药性论》中载有:“虎杖,暑月和甘草煎,色如琥珀,可爱堪看,尝之甘美,瓶置井中,令冷澈如冰,白瓷器及银器中盛,似茶啜之,时人呼为冷饮子,又且尊于茗。”(引自《中药大辞典》1331页,虎杖条备考) 据上文可知,古代系以虎杖甘草煎液作为夏令消暑之清凉饮料。寇宗爽也说:“今天下暑月多煎根汁为 Tang Yuquan’s “Theory of Pharmacology” contained: “The giant knotweed, the summer moon and the licorice decoction, the color is like amber, lovely and tasteful, the taste is sweet, the bottle is placed in the well, and the coldness is as clear as ice, in white porcelain and silverware. Sheng, like tea and tea, when the people call for cold drinks, and respect for Yu. ” (quoted from the “Chinese Dictionary” 1331, notes preparation of the sticks) According to the above we can see, the ancient Department of the roots of licorice decoction as Summer refreshing drinks. Zong Zongshuang also said: "Today’s summer months are more fried root juice.