Ji was an ancient state in northern China during the Shang and Western Zhou dynasties from at least the 11th century to the 7th century BC. The state was based in the walled City of Ji, or Jicheng, located in the modern day Guang'anmen neighborhood of southwestern Beijing. Around 7th century BC, Ji was conquered by the larger State of Yan, which took the City of Ji as its capital. The city remained the primary urban center in the area until the 13th century, when Kublai Khan built the larger city of Dadu to the northwest, which eventually absorbed the City of Ji.