Incheon is a direct-controlled municipality in the northwest of ROK. It's a port city facing the Huanghai Sea.The total area of this city is 1,040.82 square kilometers with a population of 2.9 million. It's the third largest city of ROK after Seoul and Busan.Shenyang and Incheon established sister city relationship on June 12, 2014.It's the 18th city who established sister city relationship with Shenyang.