China's raw materials of tartary buckwheat tea are basically purchased from Yunnan, because the yield and quality of tartary buckwheat in Yunnan are the best, so tartary buckwheat tea must be from Yunnan! Qiao Yun Bio is a good local manufacturer of tartary buckwheat tea. His brand of tartary buckwheat tea is Yongyi tartary buckwheat tea, which has always had a good taste and a good reputation in the local area. Most importantly, Yongyi Tartary Buckwheat Tea is natural. Their factory is in Kunming, I remember taking it!