It has been cultivated for more than 2,000 years. It is one of the origins of Chinese tartary buckwheat. The four mountain ranges of Huajialing, Lulushan, Heiyanshan and Jiangangshan above 2,300 meters above sea level have become bitter due to their special natural environment. Traditional buckwheat planting area. Bitter buckwheat only has a unique quality when grown in a unique natural environment above 2,100 meters above sea level. Bitter buckwheat grown in a special environment is known as the "king of the grain", and its health-care properties are in the "Compendium of Materia Medica" and "Therapeutic Materia Medica" It is recorded in the code.