China also protested when tariffs were floated and any kind of non-retroactive protectionism was proposed. Framing this as only being a problem because the "rules were changed afterward" is deceptive (as is implying that China has "clear" rules). In any case, this Dutch government takeover was done on the basis of a law from 1952, so no, the rules were not changed after "luring" investors (who retain ownership and can still sell their shares, they were not expropriated, so they lose no money).