Russia is buying a lot of equipment from China too.
They're literally throwing their old garbage and cheap shit at them. They haven't even brought out their best stuff.
https://www.japantimes.co.jp/news/2023/03/18/asia-pacific/china-russia-ukraine-war-ammunition-u-s/
https://asia.nikkei.com/Politics/Ukraine-war/Special-report-Russia-buying-civilian-drones-from-China-for-war-effort
https://www.politico.com/news/2023/03/16/chinese-rifles-body-armor-russia-ukraine-00087398
https://finance.yahoo.com/news/chinese-military-equipment-found-way-200000133.html