Longjing Beach in Danzhou, Hainan, became a Labor Day holiday sensation – and for good reason. Here, crystal-clear "glass water" meets ancient black volcanic rocks, creating a striking contrast. Tucked away in E'man Town, the sea shimmers like jelly under the sun, while the shoreline is scattered with dark reefs shaped by volcanic eruptions millions of years ago. Shell hunting, dramatic cliff views, golden hour vibes – this is the coastal escape you didn't know you needed.