Grain units, located 5 kilometers northeast Huaiyang County, earth station high-Zhang Yu, Canton 10 acres, the legend is the Yan Emperor Shen Nong Christians out with farming, planting crops in the place. Shen Nong nearby wells, to irrigate crops and dig Shen Christians. Shen era, Yan teach people planting corn to Chongfu hunger, the grain is divided into five Yan were named as rice, millet, millet, wheat, beans, Yan agriculture things here, know Gengjia, seed grains, so for the Shen Nong, a founder of China';s traditional agriculture.

Shen Nong tasted a hundred herbs also sent an open, invented herbal medicines, human treatment, the title of the founder of the motherland medicine. In the reign of Emperor Yan 140 Legend, in the tea-time visit to Changsha, no disease dies, aged 168 years. Yan Emperor Shen Nong "are in Chen", completed the great changes in hunting to agriculture, to the center of the Huang-Huai Huaiyang large plains of the original as is the birthplace of agriculture, later Emperor respect as the "Five Emperors" in the first, well deserved .