Wudalianchi Dedu Airport — Heihe, China

DTU represents Wudalianchi Dedu Airport, which serves Heihe and the broader Wudalianchi volcanic scenic area in Heilongjiang province, northeastern China, near the Russian border. Wudalianchi is renowned for its dormant volcanic landscape, mineral springs, and lava fields, making it a notable domestic tourist destination, and DTU supports seasonal visitor traffic heading to these natural attractions. The airport also plays a role in connecting this remote northern border region to major Chinese cities, given the area's distance from larger transportation hubs. As a relatively young regional airport, DTU reflects China's broader pattern of building air infrastructure to support tourism development in less accessible northern provinces.