Bituan is neither a reliable trading platform or leading asset project. It failed as soon as users knew about it. Now, anyone can't access the page because it has an unreachable server. There is not way to ensure if this temporary or permanent. But personally, something I'd like to say is that this platform has not a pretty record of sales.
I must recommend you to think twice about the type of exchanges you look for. None of them will really help you to execute your tasks because most of them are closed. Bituan joined to that team of abadoned exchanges due to diverse reasons, but knowing that the small financial activities of this project were once of them, helps me to warn you of any issue you might face with your assets.
NOTE: It holds similar features to most of the undeveloped trading platforms that do exist in the market.