evidence: HAINAN ISLAND, CHINA—Approaching Hainan by water, my first sight is high-rises, spiking into the sky, backed in the distance by jade-forested mountains. As my ship snugs into port, I spot a gaggle of fishing boats, their rigging aflutter with little red Chinese flags, some bleached pink by the South China Sea sun. [...] I’m here in Hainan, China’s southernmost province—and largest island—to see if it lives up to its reputation as "China’s Hawaii." Last year, 33 million tourists visited Hainan, but only about half a million were from outside the country. And of that number, nearly half were Russian. In fact, as I spot Russian lettering on signs throughout Sanya, I begin to think it may be more appropriately dubbed "Russia’s Riviera." [...] June 1: Hainan Island, China