Watch Xiaomi’s video above showcasing Xiao ai. As you can see it’s very similar to Google assistant and siri. It is specifically tailored for Chinese market and comes pre installed on it’s latest flagship Xiaomi mix 2s.
Xiaomi hasn’t specified any date for release in other markets, probably it might never appear outside china as it can be just a replacement offered by Xiaomi because Google assistant isn’t available in China. Xiaomi phones outside China comes with Google assistant built in.