how does that relate to spying level or depth
I can't imagine more depth than infecting the HDD's firmware, stealing the SIM cards encryption keys of common citizens, tracking my phone's movements, every conversation I have over the Internet (skype, email, messaging, etc), making fake slashdot copies to infect people, designating me "enemy of the state" for reading and supporting wikileaks.
There is no indication that the Chinese are doing any of those things to foreigners (they do read Chinese communications).
It is true that China has shown aggression to neighbors, but it is also true that they believe Taiwan IS China. I strongly disagree, since Taiwan has been independent for several decades. On the other hand, having billions in weapons pointing at China doesn't help much. It is hard to believe they should be nice and understanding neighbors to people who have military pacts with the US.