Flash to miui 9 from miui 10 on Redmi 6 pro

[Sleepy Wolf]

Hi, i'm using Redmi 6 Pro bought from China, it's default rom using miui 9.6 china stable and i've updated it to miui 10.0.2.0 china stable. So if i flash my phone back to the stock rom(default rom using miui 9.6 china stable),does my phone get bricked ? cause i like miui 9 more than miui 10