Chinese farmers have built one of the largest vegetable production bases near the the vast Mu Us desert, which also known as Uxin desert that covers Shaanxi, Mongolia and Ningxia that frequently hit by sandstorms, reports Xinhua News.   The vegetable base, covering Bainijing town and Haiziliang village of Shaanxi province, presently produces 180,000 tons of vegetable a year, including 90,000 tons of chillies.   The two vegetable wholesale markets in the region have sold 66 million yuan worth of chillies and potatoes to other parts of the province since 2003.   In 2005, Bainijing town registered 220 million yuan of agricultural output, 80 percent of which came from vegetable production. And last year, the per capita net income of villagers rose to 2,125 yuan, cited Xinhua.