It allows China to see Western playbook for sanctions, i.e. harden BRI to withstand economic warfare, fully stand up CIPS to soften the blow of SWIFT sanctions, etc.It allows the Chinese military to learn from the mistakes of the Russian military, i.e. don't commit war crimes and crimes against humanity in front of the whole world, document with drone footage if you're going to attack civilians to prove they were being used as shields, use UCAV and counter-UCAV technology as much as possible, get anti-ATGM technology on tanks ASAP, logistics logistics logistics, etc.