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 Incheon International Airport serving Seoul. Mudanjiang is located 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.