Food is the first necessity for people. Over the years，Chinese are working on producing enough food to feed a population of 1. 4 billion. The "Father of Hybrid Rice"，Yuan Longping，created the world's first hybrid super-rice，which is able to yield（出产） 20 to 30 percent more than traditional types.
Following Yuan's footsteps，more Chinese scientists are doing creative work in this field. A research team leading by Professor Hu Fengyi from Yunnan University has made great achievements in developing a perennial rice（多年生稻）. The results were published in Nature（《自然》国际学术期刊） in November，2022.
The perennial rice is a kind of hybrid rice combined（结合） both common types and wild ones. Traditionally，rice should be planted every year. But this kind of rice only needs to be planted every four years. According to the test data of Hu Fengyi's team in Xishuangbanna and other places in Yunnan Province，perennial rice can yield twice a year. It produce s almost the same amount of rice as the traditional types with much lower labor costs. That can greatly reduce 70% of the work of farmers. In addition，it cuts the use of chemical fertilizers（化肥） so that it reduces the environmental pollution.
The perennial rice is of great importance to the development of China's agricultural（农业的） production. It is believed that this new type of rice will be more widely grown in the future.
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