Need CPU fan replacemnt

Hi everyone, maybe someone can help me.

My CPU fan in my CHUWI Ryzen RZBOX is unfortunately broken, it’s making a lot of noise and needs to be replaced.

Where can I get a replacement fan for my CHUWI RZBOX mini-PC? I’ve already searched online for spare parts, but haven’t found anything relevant.

And my next question is, how do I remove the top cover?

You can find tutorials on YouTube.

I believe fans have standard sizes.

It might be dirty, but there are tutorials for cleaning it.

Thanks for answered.
I have search a lot of stuff in internet, but i don’t find replacement tutorial for CHUWI RZBOX!
And where can i buy a new cpu cooler for my mini-PC?

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