Zi Collection, Upper Volume, Page 1350, Entry 07 Pronounced yao (entering tone) — refers to the appearance of rice shoots emerging. Also, in Jiyun (集韵), pronounced mi (third tone) zhao (entering tone), sound: miao — refers to the awns and thorns of grain ears. The "Book of Song: Treatise on Music" (Songshu Lüzhi) records: "During the Autumn Equinox, the awns and thorns of grain ears take shape, and after the awns and thorns take shape, the grain ripens. The number of tones is twelve, so twelve awns are equivalent to one su (粟), and ten su are equivalent to one cun (寸)." The annotation refers to the awns and thorns of grain ears. Verification: [One su is equivalent to one cun.] In accordance with the original text of the "Book of Song: Treatise on Music" (Songshu Lüzhi), "one su" has been changed to "ten su."