mi10 ultra

Hello, I'm new to Xiaomi world, and i want to understand some points : I have a Xiaomi 10 Ultra with MIUI 12.0.15.QJJCNXM Stable by xiaomi.eu installed by the Trandingshenzen + TWRP 3.4.2b-0623 wzsx150 Today i received an OTA notification for the update to 12.1.1.0.RJJCNXM I need some...