Mudanjiang (Chinese: 牡丹江; Manchu: Mudan bira) is a prefecture-level city in southernmost 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 (154 mi) 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.