By most measures, the self-styled "Chinese Riviera" on Hainan Island has a long way to go before catching up to Cannes, St. Tropez or Nice.

But the organizers of Hainan Rendez-Vous at the island's Sanya resort did their part to boost the area's image this past weekend, hosting an extravaganza of private jets, vintage and top-end autos, luxury properties and giant yachts.