Finally, Google has delivered it’s Google Assistant in Chinese. The current version works in Chinese traditional and is localised for the Taiwanese market.
So far, the assistant works just like the English edition, just say “Ok Google or Hey Google” and use voice commands to make a call, ask questions about travel timing, nearby restaurants etc. It does not support dual Mandarin and other languages at the moment.
Google Home or Home Mini still does not support the Chinese language.
Here are some screen shots from my Pixel 3 XL. (currently it only works on Pixel 3 and Pixel 3 XL).