Observe the change of bubbles around chopsticks to estimate the oil temperature: try not to let the oil temperature be too high ~ When the oil in the pot starts to smoke ~ Then pay attention to whether the vegetables you eat are toxic ~ Too high oil temperature will destroy the nutrition in the vegetables. If you use soybean oil ~ it can be slightly higher ~ if the temperature is too low, it will smell like beans. 1, it will also produce toxins during heating ~ it is harmful to the body, and there are big bubbles coming out slowly ~ The temperature is about 50~60 ~ This temperature is most suitable for frying (meat). 2. The bubbles become thinner from the bottom to the top of chopsticks ~ The temperature is about 60~80 ~ Stir-fry or stir-fry a single vegetable. 3.