Chou Collection, Upper Volume Radical: Mouth (kǒu) Character: Ying Kangxi Stroke Count: 20 Page 214, Entry 01 Pronounced ying Shuowen Jiezi (Shuowen): The sound of birds chirping. Book of Odes (Shijing), Lesser Odes: Birds chirp ying ying. Erya, Explaining Teachings: Ying ying, signifies mutual critique and correction. Commentary: Ying ying represents two birds chirping, metaphorically referring to friends who cut and polish one another to reach uprightness. Also, in the Collected Rhymes (Jiyun), it is written in the variant form ying. Zhang Heng, Rhyme-prose on Longing (Si Fu): The ringing of jade bells, ying ying. Textual verification: Erya, Explaining Teachings: Ying ying, signifies mutual critique and correction. Commentary: Ying ying, the sound of birds chirping. Adjusted in accordance with the original text to read: Two birds chirping.