China is putting containerized missile launch tubes and drone launch systems on their container ships. If these get widely deployed at some point, there could come a time when there will be weapon systems already on-location in all of the major ports of China's adversaries. Most naval facilities have civilian ports nearby.

Despite the nuclear reactor, aircraft carriers won't stay in the fight long if their supply lines are disrupted. And also it's not likely that a carrier group could fend off a wave of 10,000-20,000 drones launched from a container ship that happens to be sailing near it.

At the end of the day, we rely more on nuclear weapons and MAD to deter these kinds of major hostilities between powerful countries. Talking about how conventional weapons match up is a bit of a red herring. The only thing that would change that would be very reliable nuclear missile/warhead interception systems - and I don't think any country even has a roadmap to such a thing.