Xiangdao itself is not health preservation, but the application of Xiangdao to spices and fragrant materials. On the other hand, learning incense can cultivate one's self-cultivation. The earliest incense paid attention to the medicinal properties of herbs. Incense can remove the foul smell and make every organ in a comfortable state, so it can be used for health preservation. But learn to participate in many ways. Such as herbal incense, Tibetan incense and so on.