There are six civil airports in Liaoning: Shenyang, Dalian, Dandong, Jinzhou, Liaoyang and Chaoyang, of which Shenyang Taoxian Airport and Dalian Zhoushuizi Airport are international airports. The railroad network with the highest density is in Liaoning, with Shenyang as its center, extending to different directions in a radioactive pattern. Shenyang is the center of the Beijing-Shenyang, Shenyang-Dalian, Shenyang-Benxi, Shenyang-Haerbin and Shenyang-Fushun Expressways, and the Shenyang Transit Expressway. As the largest ice-free port in Northeast China, Dalian Port owns passenger ships to Tianjin, Qinhuangdao, Penglai, Yantai, Weihai, Shanghai and Incheon in South Korea.