Unfortunately, no, not really. They are absolutely able and willing to confiscate your devices at any time once you’re on Chinese soil, and once you’ve lost physical control, that’s the end of trust for that device. Even beyond that, it’s not unheard of for there to be vulnerabilities in Wi-Fi, Bluetooth, etc that make your device susceptible to wireless attacks. IMO it’s not worth the risk.

Here is just one example of this type of thing uncovered by The Guardian, New York Times, and others in a joint investigation: theguardian.com/…/chinese-border-guards-surveilla…