In the "Guangyun" and "Jiyun," it is recorded as having the pronunciation "qu jian qie," which sounds like "jian." The "Shuowen Jiezi" explains it as the root of a tendon. Additionally, in the "Yupian," it is recorded with the pronunciation "ju yan qie," and in the "Jiyun," it is recorded with the pronunciation "ju yan qie," which sounds like "jian." The "Boyao" explains it as the tendon next to the spine. Another explanation refers to a thick tendon. It is sometimes also written with the character "jian."