Yilan (Chinese: 宜蘭; pinyin: Yīlán) is a town in and the seat of Yilan County in south-central Heilongjiang province, China, located where the Woken (倭肯河) and Mudan Rivers flow separately into the Songhua River. It has a hukou population of 37,000[when?] an As of 2011[update], It has 8 residential communities (社区) and 4 villages under its administration. It is serviced by G1011 Harbin–Tongjiang Expressway and China National Highway 221.