Guangyun (Guangyun) and Jiyun (Jiyun) use the fanqie "hu guang" to pronounce the character, which is the same as "huang." Yùpiān (Yùpiān) explains it as blurry vision. The "Ling Shu Jing · Mai Pian" (Ling Shu Jing · Mai Pian) records: "The eyes are blurry and indistinct, as if nothing can be seen." The commentary states: Kidney deficiency causes blurry pupils and dizziness. A folk version incorrectly writes it as , which is wrong. Also, Guangyun (Guangyun) uses the fanqie "mo lang" and Jiyun (Jiyun) uses the fanqie "mo lang" to pronounce the character, which is the same as "mang." Furthermore, Jiyun (Jiyun) uses the fanqie "hu guang" to pronounce the character, which is the same as the rising tone of "huang." The meaning is the same. Jiyun (Jiyun) sometimes writes it as . Zìhuì Bǔ (Zìhuì Bǔ) incorrectly writes it as , which is wrong. This character is composed of "mu" and "".