The Tuancheng Fortress or Tuan Cheng Fortress is a historic 18th-century fortress located near the Fragrant Hills in the Haidian District of Beijing, China. Today, the fortress is a national museum and is also known as the Tuancheng Exhibition Hall.
The fortress was built in the 14th year of the Qianlong Emperor's reign (AD 1749). Tuancheng was a castellated military training compound used by the Qing to train, inspect, and honor their troops.
The site is especially well preserved. Today, the fortress frequently holds large-scale martial arts events and attracts fans from all around China.