Zi Collection, Upper Volume, Page 12, Entry 05 Radical: Mouth (kǒu) Pronounced yāo (falling tone) 《Guangyun》(Guangyun), 《Jiyun》(Jiyun), 《Yunhui》(Yunhui), and 《Zhengyun》(Zhengyun) all read it as "yu jiao qie," with the same sound as "ao." The "Yupian"(Yupian) explains it as the head being sunken. In Wang Yanshou's "Ode to the Lingguang Palace" (Lulingguangdiantu), it is written, "with a sunken head and squinting eyes." Additionally, 《Jiyun》(Jiyun) explains it as the appearance of a large head and deep-set eyes.