White tea is cool-natured but the cool properties decrease along with years and turn into neutral nature. Hence people whose body is in cool-natured can also drink it. As the saying goes, ”1 year tea, 3 years medicine, 7 years treasure”. Aged white tea is good for our lungs and has cold-dispelling purpose. Theophylline in aged white tea can relax the tension of blood vessel and enlarge the diameter of it. It is good for increase the flexibility of blood vessel and encourage blood circulation.