Yun Lian

Yun Lian

　　The dried rhizome of the perennial herbaceous plant *Coptis teeta* from the Ranunculaceae family. The Ming Dynasty scholar Lan Mao wrote in the *Dian Nan Ben Cao* ("Compendium of Materia Medica of Southern Yunnan"): "Dian Lian, also known as Yun Lian... is over a hundred times more efficacious than Chuan Huang Lian (Sichuan Coptis)." Hence the name "Yun Lian" (Cloud Coptis). It has always been popular in inland markets and Hong Kong. The original plant’s rhizome is yellow with few branches; it has basal leaves; the plant grows to a height of 15–30 centimeters; bears a multi-branched cyme inflorescence; has long-beaked pod fruits, and oblong seeds; the flowering and fruiting period is from February to June. The commercial product appears as curved, elongated strips, featuring a “bridge stem,” with a golden-yellow cross-section and an extremely bitter taste. It can purge fire, dry dampness, detoxify, kill parasites, and treat various heat toxins and burns or scalds. It contains a variety of alkaloids, which have higher content and better anti-inflammatory and antibacterial efficacy compared to those of Chuan Huang Lian. Together with Sichuan’s "Ya Lian" (雅连), it is ranked as a premium variety of Coptis, renowned both domestically and internationally, and is a highly esteemed traditional Yunnan medicinal herb favored by physicians throughout the ages. It is primarily produced in Fugong, Gongshan, and Tengchong. Tengchong’s Yun Huang Lian is also called "Guangming Lian" (Bright Coptis). In 1955, Yunnan purchased 22 tons of it; in 1988, it exported 5 tons; and in 1996, the yield was about 4–6 tons. The market price of Yun Huang Lian is 2–3 times higher than that of Chuan Huang Lian. It is propagated by rhizomes, either cultivated or semi-cultivated, involving high costs, labor-intensive processes, and low yield per unit area (only 0.5–2 kilograms per mu).