Heda Expressway. According to Baidu map, it takes 4 hours and 23 minutes to drive from Baishan downtown to Changbai ***254.9 kilometers, while Heda Expressway is wide and flat, with little traffic and no congestion, so buses from Baishan to Changbai can take Heda Expressway. Baishan, formerly known as Hunjiang, is a prefecture-level city under the jurisdiction of Jilin Province. It is located on the west side of Changbai Mountain, adjacent to Yanbian Korean Autonomous Prefecture in the east, connected to Jilin in the west, and facing Huishan in North Korea across the Yalu River in the south.