I HIGHLY doubt that they can crack GraphaneOS. But it doesn’t matter, I am no expert after all. But what I’m sure about is that you should NEVER consider bringing your personal device with you when travelling to China. Get a cheap burner phone, and keep your real one at home. Human rights don’t exist in china. They will throw you in jail and torture you if you don’t give up your passcode. You might even get executed after a while.
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