So unless my local Chinese takeaway is classed as Chinese soil, I'll more than happily buy my phone from there
Most phones are already made over there anyway so know knows what kind of backdoor, listening devices are coded into the chips they put into 'Western Company's' phones.
The US invented it.
Doing this has a non negligible political cost. They would only do it for a high value target. If you're that person, you're presumably aware.
* I only recall one news report of this happening years ago.
Is it possible that it's backdoored, have a secret opcode / management engine? Probably, but that goes to everyone, as it's not practical to analyze what's in the chip (unless you're decapping them and all)
I don't know what secure environments you're talking about, if it's an airgapped system then you should be secure even when what's inside 'tries to get out'.
They never said or claimed that. They rised concerns and asked about _possible_ backdoors the same way the west does about china e.g. Huawei.
European tech is in shambles and everyone else is barely holding it together outside of tech.
From Wikipedia: https://en.wikipedia.org/wiki/Lenovo