The Marco Polo Bridge or Lugou Bridge is a stone bridge located 15 km southwest of Beijing's city center in the Fengtai District. It bridges the Yongding River, a major tributary of Hai River. Situated at the eastern end of the bridge is the Wanping Fortress, a historic 17th-century fortress, with the Museum of the War of Chinese People's Resistance Against Japanese Aggression inside.

Beijing, alternatively romanized as Peking, is the capital of China. With more than 22 million residents, Beijing is the world's most populous national capital city as well as China's second largest city after Shanghai. It is located in Northern China, and is governed as a municipality under the direct administration of the State Council with 16 urban, suburban, and rural districts. Beijing is mostly surrounded by Hebei Province with the exception of neighboring Tianjin to the southeast; together, the three divisions form the Jingjinji megalopolis and the national capital region of China.