Yangxian black rice belongs to Gramineae and Wild Rice, and the traditional varieties are indica rice and glutinous rice. It was bred by Zhang Qian in the Western Han Dynasty. According to legend, Zhang Qian was studious when he was young and always wanted to make a career in the future. One day, he was sleepy when he was studying in the willow forest near the Weishui River in his hometown (at the junction of Yangxian County and Chenggu). He fell asleep beside the willow tree and dreamed of Wenquxing in the sky, that is, asking Wenquxing for advice. Wen Quxing replied: "When you see black rice, you will make a fortune." . From then on, Zhang Qian took pains to avoid the cold and heat. Besides studying hard, whenever he has time, he goes to the fields to look for Black Valley. After searching for a whole year, I found 1 fragrant rice, which was handed down later. After searching for another two years, I finally found L black rice when I was farming with my father in the first year of Han Jianyuan (BC 140). After peeling, the rice grains are all black. This is the heyday of the Han Dynasty. In order to eliminate the threat of Xiongnu to the north, Emperor Wu of the Han Dynasty wanted to establish friendly relations with the Dayue family, so he openly recruited talents who could undertake this important task. In the second year of Han Jianyuan, Zhang Qian responded, which was the beginning of "Zhang Qian connecting the western regions". Because black rice is the symbol of Zhang Qian's success in official career, it has been carefully cultivated and cultivated since then, and it has been cultivated by the working people of past dynasties and has been propagated to this day. Now he lives in Guanzhong, Sichuan, Ningxia, Anhui, Hunan, Hubei, Shanghai, Guangdong, Guangxi and other places. This legend is a myth, but it illustrates the fact that black rice and fragrant rice have been planted in Yangxian county for more than 2000 years.