What's the difference between the old pressure cooker and the new one? From the perspective of safety and energy efficiency.

There is not much difference in efficiency. The biggest change is the design of safety valve. First, the number of safety valves has increased. In the past, it was mostly single insurance, but now it is mostly three risks, and some of them are already four risks. Great improvements have been made in the aspects of overpressure exhaust, blocking prevention and misoperation prevention, and the safety performance of pressure cooker has been greatly improved.