Notice the coconut trees? Hainan is full of coconut trees, giving it a tropical atmosphere. As Sanya is in the south of Hainan, it's hot while Haikou in the north is pleasantly cool. I noticed that coconut juice is a favourite with the locals.
Sanya beach is not nice compared to Dadonghai, a nicer beach about 10 -minute cab ride away. Sanya is crammed with hotels.
Sanya beach: domestic tourists
While northern China freezes over this year, Sanya is hot. I wasn't surprised that Hainan in January is very popular with the mainland Chinese.