If there is sales, it is suspected of smuggling. China Red Bull is mainly composed of amino acids and vitamins. You can drink it in moderation before the exam, before and after exercise, when you are tired or in a bad mental state. One or two cans a day can achieve anti-fatigue effect. However, if you are seriously short of sleep, it is recommended not to rely solely on functional drinks to maintain it, but to pay attention to the combination of work and rest and adjust the schedule.