Huandao Road (环岛路), Xiamen Island's oceanfront ring road, is an important transportation thoroughfare and a popular destination in its own right. You can travel it by bus, taxi, or foot, but bicycles are the most popular choice with tourists. Single, double, and even triple bicycles can be rented at scenic sites along the road by the hour or all day. Handsome landscaping, palm trees, and ocean views make the ride a beautiful one, and generous bicycle lanes keep bicyclists safe from the flow of traffic (but watch out for the buses, which some times use the bike lanes).
Most bicyclists on Huandao Road stick to the southern side of the island, where the best scenery and beaches are. Baicheng Beach makes a good starting point, and from there other beaches and sights can be reached by riding counter-clockwise. It's possible to continue up the east side of the island but the scenery's not as dramatic and it's a long way.