China herbal tea. Darentang Jiuzi Tea is a kind of traditional Chinese medicine tea, which is composed of nine kinds of traditional Chinese medicines, such as Scutellaria baicalensis Georgi, Coptidis Rhizoma, Cortex Phellodendri, Gardenia, Radix Paeoniae Alba, Glycyrrhrizae Radix, Ginger, Jujube and Lycium barbarum. Its main functions are tonifying kidney, calming heart, benefiting qi, promoting fluid production, astringing and promoting digestion. Rentang was founded in 1930s, and 1993 was named as "designated unit for foreign tourism" by Dalian municipal government.