Black dates are not as sweet as red dates. Black dates are not as sweet as red dates. Black dates, which are only distributed in northern China, are mainly divided into two types: nucleated and seedless. Black jujube can tonify the middle energizer, nourish the stomach and strengthen the spleen, nourish the blood and strengthen the spirit, moisten the heart and lungs, regulate the camp and health, promote the production of body fluid, delight the eyes, dredge the nine orifices, help the twelve meridians, cure all kinds of poisons and reconcile various medicines, namely jujube, which is a temperate crop with strong adaptability and wide planting range. Jujube is considered as a hardcore crop.