There are many kinds of Lycium barbarum, but only Lycium barbarum can be used as medicine. Among Lycium barbarum in Ningxia, Beruiyuan's Lycium barbarum has the best quality and is safe to take. Many Lycium barbarum bought outside look good, and it says "Zhongning Lycium barbarum" or "Ningxia Lycium barbarum" are all fake, smoked with sulfur or dyed with dyes. Beruiyuan's wolfberry is very good. There is one in Zhujiang New Town, Guangzhou, which seems to be on Jinsui Road. The map can be found in Bairuiyuan Lycium barbarum Health Center.