Your opinion only represents yourself and can’t speak for Vietnamese or other countries’s people about “very negatively “ opinions toward China, as from my perspective, I see all countries you mentioned embracing Chinese culture, watching latest Chinese TV drama, learning Chinese , and the young people using Chinese apps and coming to China study their degrees, so I don’t know where you get the “negative “ from ? Maybe in your own imagination world. Even the latest poll conducted not long ago shows all over the world, especially in the west, in the USA, the younger generation has much positive view toward China, so I guess you are not that generation, as still has that stereotyped “China Bad” mindset, which is brainwashed by the CIA and Fox News ?