Qiqihar Sanjiazi Airport (IATA: NDG, ICAO: ZYQQ) is a civil airport serving Qiqihar, the second-largest city in Heilongjiang Province, northeastern China. It provides air connectivity for the region's industrial base and is one of several airports in Heilongjiang. The airport handles domestic routes primarily to major Chinese cities including Beijing, Shanghai, and Guangzhou. It serves both leisure and business travelers, supporting Qiqihar's economy, which is known for heavy industry and its proximity to wetlands famous for red-crowned cranes. Sanjiazi Airport operates on a relatively modest scale compared to major Chinese hubs, reflecting Qiqihar's regional city status. Ongoing infrastructure developments in China's aviation sector have contributed to gradual improvements in connectivity for the airport.