Black rice has been planted in Yangxian county for more than 2000 years. According to legend, before Zhang Qian became a monk in the Western Han Dynasty, he studied in Chenggu, his hometown in Hanzhong (now Chenggu and Yangxian in Shaanxi). One day, he was reading in the willows. He was sleepy and fell asleep under the tree. In his dream, he visited the Bullfighting Palace and asked Wen Quxing about his future. Wen Quxing told him: "Wan Li in the future." Zhang Qian asked him when he would get rich. Wen Quxing replied: "You will make a fortune when you see black rice." Since then, besides studying hard, Zhang Qian often went to the river to look for black rice. One day three years later, he finally found a gray ear of rice in the wild rice. When he peeled off the rice husk, it turned out to be black rice. Zhang Qian just became an official in this year. It is said that the black rice discovered by Zhang Qian is the black rice in Yangxian County that has been passed down to this day. Because of its delicious taste, Yangxian black rice was presented to the emperor as Gong Mi from the time of Emperor Wu of the Western Han Dynasty to the end of the Qing Dynasty. Although Empress Dowager Cixi was like a lost dog, she still remembered the fragrance of black rice in Yangxian County and ordered people to offer it.

Yangxian black rice is black in color and white in cytoplasm. The cooked porridge is dark brown, rich in flavor and high in nutritional value. According to the analysis of Shaanxi Grain and Oil Testing Station 198 1 year, black rice contains 8.5% protein, which is higher than ordinary rice 1.7%. It contains eight amino acids such as lysine, which is 15% higher than that of ordinary rice. According to the analysis of the relevant departments of the Ministry of Commerce, black rice contains vitamin B 10.2 1 mg, B20. 16 mg, contains 2.8% fat, and has relatively high inorganic components such as phosphorus, calcium, iron and zinc. Eating Yangxian black rice regularly has the functions of nourishing yin and tonifying kidney, benefiting qi and strengthening body, improving eyesight and promoting blood circulation. If you cook porridge with Yangxian black rice and northern Shaanxi red dates, it tastes delicious and sweet, and it is called "black and red double unique". The "black rice eight-treasure porridge" made of Yangxian black rice mixed with ginkgo, tremella, walnut kernel, peanuts, red dates, crystal sugar and coix seed is a rare high-grade nourishing food. If you take it for a long time, you can live longer.