This is not an issue at all because the current rules permit peaceful passage through territorial waters. That broadly means no lingering, no spying, and going

This is not an issue at all because the current rules permit peaceful passage through territorial waters. That broadly means no lingering, no spying, and going straight to the intended destination. Access can be denied for security reasons of course. This is totally fine for commercial traffic. Since China has a huge export market, it is also not interested in raising shipping costs.