Longnan Chengzhou Airport — Longnan (Cheng), China

LNL denotes Longnan Chengzhou Airport, a regional airport in mountainous southeastern Gansu province, China, serving the Longnan prefecture. Opened in the 2010s, it was developed to connect this remote, earthquake-prone, and topographically challenging area to major Chinese cities, since ground travel through the surrounding mountains is slow and winding. LNL primarily handles domestic flights to hubs such as Xi'an, Chengdu, or Lanzhou, supporting local trade, government travel, and modest tourism to Gansu's scenic areas. The airport reflects a broader pattern of Chinese infrastructure investment aimed at reducing isolation in interior mountainous regions, with a single runway suited to smaller narrow-body aircraft given the surrounding terrain constraints.