The word "uniqueness" often refers to the uniqueness of artifacts and shapes of cultural relics. Incense refers to the unique wiping fragrance deposited in the Wan Wen era. Incense is the tooth of sperm whale or whale, which is a good bone carving material. It is widely used to decorate weapons, make souvenirs and jewelry, and is only used for small-scale carving. In the eyes of literary lovers, the sperm whale's teeth are moist and unique, and it feels very smooth and delicate, so it is called "the king of dental supplies".