Chengdu–Kunming railway

The Chengdu–Kunming railway or Chengkun railway (simplified Chinese: 成昆铁路; traditional Chinese: 成昆鐵路; pinyin: chéngkūn tiělù), is a major trunkline railroad in southwestern China between Chengdu, the capital of Sichuan Province and Kunming, the capital of Yunnan Province. The line traverses rugged terrain from the Sichuan Basin to the Yunnan–Guizhou Plateau. The original line was 1,134 km (705 mi) long and was built between 1958 and 1970, with much of the work coming during the Third Front campaign to develop industry in China's interior. Major cities along route include Chengdu, Pengshan, Jiajiang, Emei, Ebian, Ganluo, Xide, Xichang, Dechang, Miyi and Panzhihua in Sichuan Province and Yuanmou, Lufeng, Anning and Kunming in Yunnan Province.

Construction of a largely new 1,083 km (673 mi) long double-track line started in 2010 and was completed on 26 December 2022. A northern section of the old line was called the Emei–Panzhihua railway, but since the completion of the new line has been called the Chengdu–Panzhihua (shortened to Chengpan) section of the line and a southern section was called the Yuanmou–Kunming railway, but is now called the Yuanmou-Kunming section of the line.