As I pointed our in a reply to another post, there is one tri-point border connecting CHINA, NORTH KOREA and RUSSIA. Here are the coordinates: 42.41652712,130.63920061,BTG『大陸西遊記』~山西省 長治市~,BTG『大陸西遊記』~山西省 晋城市~,BTG『大陸西遊記』~吉林省 松原市~,BTG『大陸西遊記』~吉林省 長春市 双陽区~