Hubi Exchange is a centralized exchange from HongKong. This exchange was founded in 2016. Personally speaking, I don't think this exchange is active at all, though it looked like a promising exchange, it seems like the exchange has gone out of service.
First, the exchange was marked as an Untracked Listing on CoinMarketCap, after which I tried accessing the website but there wasn't any sign of response, all I saw after the page loaded was an error message.
I also noticed that the entire Telegram group was now a home to scammers, spammers and phishers who were dropping several links that were most likely scams.
I went on to check on its twitter account, and this was what led me to the conclusion that this exchange is actually no longer in service. The twitter account of Hubi Exchange had been suspended for violating the Twitter rules and regulations.
Since there's no official announcement from the founders of this exchange, I'll implore any trader to stay away from this exchange for now.