Everyone does plagiarism. You can find companies even in Germany and Japan doing it. But here the difference is that in China, the plagiarism is state-sponsored. Even if some Chinese company gets sued in the western nations, you can expect the Chinese government to support them.
It is expected, after all, it is a single-party, authoritarian country. In democracies, industrial espionage tend to happen between rival companies and are usually not tolerated by the state. With China, it would even be harder to sue anyone.
Reminded me of the planned Nicaragua canal. It was later speculated that the company owner is just a front for the Chinese government, considering the huge expense needed for it. Not to mention this certain Wang Jing came from telecommunications, not construction, and haven't built anything before.