San Ya

Sanya is the closest thing mainland China has to a tropical resort town, and it functions as one: this is where northern Chinese families fly in winter to escape sub-zero temperatures back home, landing into a climate that rarely drops below 20°C even in January. The city itself is unremarkable — the draw is the string of bays along its coast, each with a distinct character. Yalong Bay is the polished, resort-lined stretch favoured by international hotel chains and honeymooners; Dadonghai and Sanya Bay sit closer to downtown and feel more local and lived-in; Haitang Bay to the east has newer development and some of the calmest water for swimming.

Wuzhizhou Island, a short boat ride off the coast, has the best diving and snorkeling conditions in mainland China, with reasonably clear water and coral that, while not pristine by Southeast Asian standards, is a genuine novelty in a country with a short tropical coastline. Inland and to the south, Nanshan sits at the edge of a large Buddhist cultural park built around a 108-metre statue of Guanyin standing in the sea — one of the tallest statues in the world — while Tianya Haijiao, 'the edge of the sky and corner of the sea,' is a stretch of inscribed granite boulders on the coast that has symbolised the remote southern edge of the Chinese empire since exiled officials were sent here in imperial times.

Hainan's food culture leans lighter and more coconut-and-seafood-forward than mainland Chinese cuisine, closer in spirit to parts of Southeast Asia — Hainanese chicken rice actually originated here before Singaporean and Malaysian versions made it internationally famous. The best window to visit is exactly when the rest of China is coldest: November through April is dry and warm, while summer brings heat, humidity, and typhoon risk. Three to four days is enough to settle into beach time, do a Wuzhizhou snorkeling trip, and see Nanshan and Tianya Haijiao without rushing.