Zi Collection, Upper Volume, Page 2, Entry 01 "Yu Xi qie" pronunciation, same as "yi" — *Tang Yun* and *Ji Yun*. Explained as a mountainside — *Shuowen Jiezi*. "Tian yi" — a place in Jiuquan Commandery — *Hanshu*. The annotation explains: named after a slope called Tian yi, which was located there. Also, "yin qi qie" pronunciation, same as "yi", referring to a type of tomb — *Ji Yun*.