This is the 2nd time China did this in that Baltic isn't it? Both times look intentional.. maybe don't allow Chinese ships in the Baltic?
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Both of the two Chinese registries are open, pretty much anyone can register ships there. It's a bit like the .tv domain — if you see something.tv you can't assume that it's a company in the country Tuvalu.
Look at the nationality of the captain and the beneficial owner instead.
how do you intend to "motivate" a sovereign country?