No direct way by boat.
Was it a guess or what is the background information you have about it?
A number of cruise lines have Halong Bay and Sanya as ports of call on their schedules BUT you need to check that you can embark/disembark at will - for most companies this is a big no no.
Judging on your previous posts on this site, looks like you may live on Hainan. If this is true, would you happen to have any housing lists or resources where I could look for long-term (1-2 year) housing options in the Haikou area? I'm moving with my family to Haikou this summer.
-:- Message from TripAdvisor staff -:-
This topic has been closed to new posts due to inactivity. We hope you'll join the conversation by posting to an open topic or starting a new one.
To review the TripAdvisor Forums Posting Guidelines, please follow this link: http://www.tripadvisor.com/pages/forums_posting_guidelines.html
We remove posts that do not follow our posting guidelines, and we reserve the right to remove any post for any reason.