Microwave ovens save the most electricity. Closed heating has high thermal efficiency because of its low power (all microwave ovens, microwave ovens and induction cookers are above 800W and 2000W). We did experiments. Take Galanz Q6 as an example. It takes 2 minutes to test a piece of bread, 15 seconds to heat a steamed bread, and 35 seconds to test shrimp slices. It needs less time, less energy and higher efficiency.