Jiang Cheng and Gu Fei’s teeth marks are from tattoos. According to relevant public information inquiries, Jiang Cheng and Gu Fei’s tooth marks are from tattoos. Jiang Cheng and Gu Fei's couple tattoos of tooth marks are on the collarbone and the other on the inner thigh. Qi Zui and Yu Yang's couple tattoos are on the shoulder and the other on the lower abdomen, both of which were bitten by the other party.