Zi Collection, Upper Volume, Page 21, Entry 01 "Book of Rhymes (Guangyun)" and "Collection of Rhymes (Jiyun)" state: Pronounced yu jian (falling tone), same as "yan". [䲓鰅] is the name of a type of fish, produced in Lelang. Furthermore, "Classified Rhymes (Leipian)" records: [䲓喁] describes the appearance of a fish's mouth opening and closing. Furthermore, "Collection of Rhymes (Jiyun)" states: Pronounced niu lian (level tone), same as "yan". The meaning is the same.