04 17。 Official website shows that the People's Government of Yingkou City, Liaoning Province, the area code of Yingkou is: 04 17, which belongs to Liaoning, and its jurisdiction areas are: Zhanqian District, Xishi District, Laobian District, Bayuquan District, dashiqiao city and gaizhou city (the area code is also 0417); Yingkou, located in the center of Liaodong Peninsula and on the east bank of Bohai Sea, is the mouth of Liaohe River, one of the eight major water systems in China. Yingkou is the only prefecture-level city with obvious sunset in Chinese mainland. It is the first port opened to the outside world in the modern history of northeast China, one of the birthplaces and distribution centers of Dalong stamps, and the birthplace of China Red Cross Movement.