Bms model encryption?

I have seen some avatar from chaina client. But it has been encryption. Can't use in normal client.
This is GuanYu Model which from Dynasty Warriors series. How to encrypt file like this and decrypt it and use in Normal client!
Sorry, i missing take a ss ingame. Server already closed :(

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This is model file
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This is GFXfilemanager.dll and key.dat include from client.
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Interesting bro, i hope someone could help us xd

Its almost 2021... some people knows already to do that, but it seems secret.

I don't really think its encrypted, probably just diff structure