Rice is native to tropical Asia. After being widely planted in China, it gradually spread all over the world. According to different methods, rice can be divided into indica rice and japonica rice, early rice and mid-late rice, glutinous rice and non-glutinous rice. Yuan Longping, a scientist in China, has made great contributions to the research of hybrid rice and is known as the "father of hybrid rice". The fruit of rice is rice, and rice (grain) is called rice, fragrant rice and shelled rice. Nearly half of the world's population lives on rice. There are many ways to eat rice, such as rice, rice porridge, rice cake, rice cake and rice wine. In addition to being edible, rice can also be used as industrial raw materials for wine making and sugar making, and rice husk and straw can be used as feed. The main rice producing areas in China are Northeast China, Yangtze River Basin and Pearl River Basin. Belonging to direct cash crops. It is also the staple food of one third of mankind in the world.