Dong Guo Peng Yu Health Buckwheat Tablets in Salt Lake District of Yuncheng City. Yuncheng Salt Lake District Dongguo Pengyu health care bitter buckwheat tablets have wholesale semi-finished bitter buckwheat tablets. Address: Dongguo Village, Dongguo Town, Yanhu District, Yuncheng City. Dongguo Pengyu Tartary Buckwheat Health Tablet in Salt Lake District, Yuncheng City, Shanxi Province was established on 20 18, which is a retail enterprise. Yuncheng, referred to as "Yun" for short, is a prefecture-level city in Shanxi Province, located at the southern end of Shanxi Province, facing Shaanxi and Henan provinces across the Yellow River, bordering Linfen City in the north and Jincheng City in the east.