It boasts coal, petroleum, electric power, chemical, electronics, machinery, building materials, textile, Muslin foodstuffs, and sugar production industries. Ningxia is endowed w the natural water resource of the Yellow River and has always been known as "Yellow Rig makes an affluent Ningxia." The river runs a distance of 397 km through Ningxia, irrigating more than 300,000 hectares of farmland. So Ningxia is rich in energy sources. Coal and hydropower are its advantageous energy sources. Its main produce is wheat and rice. And its cash crops include beet, the fruit of Chinese wolfberry, flax and fruits. Its animal husbandry industry is booming involving all kinds of stock such as cattle, sheep, horse, mule, and camel. Its sheepskin of a special species of sheep is worldwide known.