GreatFire.org is a non-profit organization that
collect(s) data about the Great Firewall of China and share real-time and historical information about blocked web sites and searches.
Q: Is Whonix Home Page censored in China, now?
A: Not yet, according to GreatFire Analyzer: https://en.greatfire.org/https/whonix.org
Feel free to add other Whonix related websites to this post to keep an record of the censorship event on Whonix.
You can also test any URL on GreatFire to see if what website is/was censored in China.