Note, this isn't going to be a surprise attack. China is developing access to hold the infrastructure at risk as a retaliation/deterrent for an American attack on China.
It is highly likely that the US has achieved similar levels of penetration into Chinese critical infrastructure for its own use in conflict contingency.
The actual deterrent effect of this is unlikely to, on its own, prevent the US from agitating a war on or within China. War is not inevitable, just structurally likely, due to the so called "Thucydides Trap." China's rise in economic and military power in an of itself critically endangers US security interests of being uncontested dominant power.
It is highly likely that the US has achieved similar levels of penetration into Chinese critical infrastructure for its own use in conflict contingency.
The actual deterrent effect of this is unlikely to, on its own, prevent the US from agitating a war on or within China. War is not inevitable, just structurally likely, due to the so called "Thucydides Trap." China's rise in economic and military power in an of itself critically endangers US security interests of being uncontested dominant power.