Yaonen(Chinese: 姚霓虹 燈; Korean: 야오 네온) is the largest city in Ryukyu and the second in the world(after Shanghai). The city is located on the island of Baiyun, one of the main islands(along with Ullsan, Jiju, and Ryukyushu). The city has city proper population of 15 million people, a municipalitial population of 17.6 million and a metropolitan and urban population over 20 million.