Pronounced yu jin (falling tone) in the "Guangyun" (Guangyun), with the same sound as "yin". "Shuowen Jiezi" explains it as the appearance of lush grass. It also refers to the name of a pavilion. The "Jiyun" (Jiyun) records a pavilion named "Lingting" in the Pingchun area of Jiangxia. Also, pronounced yu qi (falling tone) in the "Leipian" (Leipian), with the same sound as "yi". The meaning is the same as before.