Some people my server admin uncle included believe that bringing any device to China automatically compromises it even if you reinstall a new OS. Is this warranted as some random person?

Can I go to my public sites and/or VPN into my servers?

Edit: I go there all the time. Also, I can take these precautions but I can’t expect my family to take them. What about family members phones?

A lot of great replies, thank you! Would love the read more specifics so I can know exactly the threats and my actions

Also, this is not an anti-China post. My field is Chinese related. Just learning more about the hosting side :)