The capital of India is even within the striking range of the PLA's long-range rocket artillery. Unless the Indian leader is completely insane, he would not dare consider sinking Chinese merchant ships. It's the U.S. warships that are more likely to do such things.But the U.S. economy was not cut off from the rest of the world, not to mention the US was 100% self sufficient in all industrial goods at that time. Should a war break out over Taiwan, expect at least a trade embargo by U.S., EU, Japan, Korea, India, Australia, and some ASEAN countries. It would have all its assets in above mentioned countries frozen or seized. China would be fighting whilst isolated and cutoff, but its adversaries won’t be. Worse, countries like India could become opportunistic and start attacking Chinese merchants in the Indian Ocean. Of course, a victory over Taiwan could alleviate these isolations, but most Chinese citizens would kiss goodbye to whatever is left of China’s trade with richest countries in the world. It would probably take decades before western countries would come to terms with a unified China.
As for Europe, gosh, these guys can't even shake off their dependence on Russian raw materials.
Let's see where BASF recently moved their factories to? Oh, China, what a surprising result!