This is very consistent with the comprehensive national power approach, where you try to get into everywhere you can on the systems. The thing that we've been tracking more are the ship-to-shore cranes. China has a company, ZPMC, that has about 80% of the ship-to-shore crane market in ports around the world. It's now been declassified that these things have sensors so they can spy on military-related cargo. They can potentially be remotely controlled.
We know that deep within the seemingly mechanical systems of the ports, you have potential Chinese control. This is symptomatic of the way that Chinese companies have embedded themselves across critical infrastructure, including, obviously, water, electricity, traffic and everything else.
The logistics are part of the problem you're talking about. Even if you just look at the physical infrastructure on the ports, there's the potential for remote control and for using them as intelligence-gathering platforms.