Mudanjiang (; Manchu: Mudan bira), alternately romanized as Mutankiang, is a prefecture-level city in the southeast part of Heilongjiang province, People's Republic of China. It was called Botankou under Japanese occupation. It serves as a regional transport hub with a railway junction and an international airport connecting with several major Chinese cities as well as Seoul of South Korea. Mudanjiang is located 248 km from Vladivostok, Russia. In 2011 Mudanjiang had a GDP of RMB 93.48 billion with a 15.1% growth rate. In 2015 Mudanjiang had a GDP of RMB 118.63 billion.