The cinnabar in Zhangjiajie has been audited by the strict quality inspection department, which is the cultural and material heritage of Xiangxi and is supported by the state. Cinnabar is a natural ore, and its main component is mercury sulfide (HgS), with a mercury content of 86.2%. Cinnabar is the main raw material of China ancient alchemy, and its crystal can be used as an important material of laser technology, so the cinnabar in Zhangjiajie Tusi City is real.