This exchange has been one of the best crypto exchanges for a long time and before the famous hacking of this exchange in 2016 (Which I remember caused a relatively sharp drop in bitcoin at the time)
, it was one of the most secure bitcoin trading platforms for a long time.
The exchange has its headquarters in Hong Kong, but due to the American ownership of the exchange, ifinex Inc. is subject to US sanctions and residents of some countries under US sanctions can not use the exchange.