First of all, from the analysis of human energy system, running in the morning will burn fat quickly.
But just getting up in the morning, the organs are still in a semi-dormant state, and the blood circulation is slow, which is not suitable for a lot of exercise.
And if you don't eat for a night, your body is low in sugar, and running will cause hypoglycemia.
If you want to keep running in the morning, you'd better eat less biscuits and supplement some carbohydrates after getting up, and then go running half an hour later.
If you want to change your body in essence, do strength training first, and then run every day. Muscle changes are changes in the body's energy system, and muscle content determines the metabolic rate. Therefore, if you want to lose weight, you must start with muscle training.