Why are the dishes fried in the hotel so tender?

The frying time should also be short. If the vegetables are not cooked well, you can first blanch them in water, put some oil in them, blanch them and soak them in cold water, which will make the vegetables look better, such as kale. A well-cooked dish needs a big fire. The pot should be heated first and stir-fried quickly, such as lettuce.