"Five Continents Chronicles" says: There are resurrecting trees in Juku Prefecture in the West Sea, shaped like maples and cypresses, with fragrant flowers and leaves that can be smelled for hundreds of miles. Collect its roots and boil them in a cauldron, extract the juice and refine it like lacquer, which will make it fragrant. There are six names: returning to the soul, frightening the essence, reviving, shaking the spirit, horse essence, and dying. It can help the living to enter the memory of the deceased, find the remaining souls and bring them with them. The souls can be revived after the incense is exhausted, so it is called soul rejuvenation.
Note: The living and the deceased must be lovers of each other. The incense must be used by the deceased within seven days for it to take effect. Time passes and it is useless. When the fragrance of the living person is gone, he cannot return, and his soul remains.