'Hainan ring around the island expressway'), officially the Hainan Region Ring Expressway (simplified Chinese: 海南地区环岛线高速公路; traditional Chinese: 海南地區環島線高速公路) and designated G98,[2] is a 612.8-kilometre-long orbital expressway (380.8 mi) that encircles the island of Hainan in the People's Republic of China.

The expressway follows much of the coast of the island, except for a section in the east between Haikou and Qionghai, which takes a more inward and direct route.

The G9812 Haikou–Qionghai Expressway, which is partially complete, uses the coastal route for this stretch.

A bridge is currently being planned from Hainan to Mainland China, over the Qiongzhou Strait.

[3] The eastern portion, formerly known as the Hainan East Line Expressway, traverses through the following administrative divisions from north to south: The western portion, formerly known as the Hainan West Line Expressway, traverses through the following cities from north to south: Note: italic indicates the routes that were available in 2013 network plan, but removed in 2022 network plan