The Jiansanjiang–Heixiazi Island Expressway, commonly referred to as the Jianhei Expressway 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.