There is a gap in the time of different rice cookers, generally between 20 and 30. If it is an electric pressure cooker, when it reaches the working pressure, the heating indicator will turn off, and the heat preservation/pressure maintaining indicator will turn on, and it will automatically turn to the pressure maintaining state. When the pressure holding time is over, cooking is completed, and the heat preservation/pressure holding indicator light is on, and the heat preservation state is entered. Because there is a certain pressure, the temperature in the pot is higher than 100 degrees Celsius, so it only takes about 20~30 minutes to stew the hard-to-cook foods such as tendons and beans. As for rice, the holding time is shorter, only 8 to 12 minutes. \ r \ n: \ r \ nPrice is one of the main features of China people's daily diet, and it is also the staple food in southern China. Blindly rice, with mixed flavors, can supply almost all the nutrients needed by the whole body. Rice is flat and sweet; It has the effects of invigorating middle warmer, invigorating qi, invigorating spleen, nourishing stomach, nourishing essence, strengthening heart, harmonizing five internal organs, dredging blood vessels, hearing, improving eyesight, quenching thirst and diarrhea. Rice with embryo and aleurone layer contains 90% of the essential nutrition of human body, and all kinds of nutrition are very balanced, so it is the best staple food. The appearance of rice can be traced back to porridge. Because the requirement of controlling the amount of porridge water is lower than that of rice, the ancients in China slowly mastered the cooking effect of different amounts of water and developed fuller rice.