The Jiansanjiang–Heixiazi Island Expressway (Chinese: 建三江－黑瞎子岛高速公路), commonly referred to as the Jianhei Expressway (Chinese: 建黑高速公路) and designated G1012, is an expressway linking the town of Jiansanjiang with Hexiazi Island, entirely in the prefectural-level city of Jiamusi in the Chinese province of Heilongjiang. It is 217 kilometres (135 mi) in length and opened on 13 August 2017. Prior to the national-level G designation, the highway was designated S14 by the province.