Thickly forested, the island is sparsely inhabited and is probably not a viable destination for anything except quick part-day visits.
There are basically no roads on the island, so your options are either trekking or circumnavigation by water vessel.
See and do
Explore the forest and nature.
There are no shops at all!
Eat and drink
No facilities, though mobile phone reception should work at least on the eastern side of the island, from neighbouring Quan Lan.
Slow ferries visit the north-eastern side of the island from Cai Rong.