What is there for China to gain with a peacekeeping presence in Ukraine?
It's well known that Trump wants to reduce America's military commitments in Europe to relocate and refocus finite resources towards Asia against China. If that's the case, why would China contribute peacekeepers that will make it easier for the US to pivot eastward?
If anything, it is in China's best interest to prolong the ongoing conflict in Ukraine.
IIRC, these photos are from the AMAN 2025 military exercise that was recently held in Pakistan.