China, Iran, Hungary have proven to be Putin’s Russia’s biggest allies indirect and direct so far.
On drones, it has been shown now China has sold quite the amount to Russia:
https://www.pravda.com.ua/eng/news/2023/03/21/7394403/
More here:
The New York Times confirms the above source:
https://www.nytimes.com/2023/03/21/business/russia-china-drones-ukraine-war.html
Quiet military collaboration contrary to some claims suggesting otherwise.
China are a direct party to the war, clearly.