Hedong District (simplified Chinese: 河东区; traditional Chinese: 河東區; pinyin: Hédōng Qū) is located at the heart of the municipality of Tianjin, People's Republic of China. Its name literally means "east of the river", referring to its location east of the Hai River. Parts of the district were once part of the Russian Concession during the colonial period in the early 20th century. Hedong District hosts Tianjin Railway Station, Tianjin Customs House and General Mail Office of Tianjin. It also hosts Tianjin Conservatory of Music and Tianjin Polytechnic University (which used to be a branch of Tianjin University, the oldest university of China).