Instant Schisandra - The Serenity & Tranquility through Beverage (Wu Wei Zi Chong Ji). Packing: 12 packets (10 g) / box. Product of China. Schisandra chinensis (wu wei zi, literally "five flavor berry") is a deciduous woody vine native to forests of Northern China. Its berries are used in traditional Chinese medicine, where it is considered one of the 50 fundamental herbs. It can astringe lung qi and relieve coughing, arrest sweating and discharge of semen, promote fluid secretion, tonify the kidney, and replenish heart and induce sedation.