Never heard about this exchange but there is someone here on the forum mention this domain under Bitcoin mixer list in Chinese section.

- https://bitcointalk.org/index.php?topic=5247254.msg54706421#msg54706421

And then found this from reddit below.
- https://www.reddit.com/r/Monero/comments/iirl1m/should_i_trust_bitni/

According to him, he tested it then it works but for me, it shouldn't be trust because the domain is dead for a long time(aged domain), and someone claim it as a new owner of that domain.
Already checked them on the wayback machine it wasn't exchanges before so for me I couldn't trust this domain.

If I were you much better to stayaway from this exchange if you don't want to be scam.