Vietnamese are Chinese in origin
Not accurate!North Vietnam was part of and ruled by China for about 1000 years before it broke away in the 10th century. Many Chinese soldiers and other settlers became assimilated. The Viet majority of so called Jing is a mixture of the natives with various migrants from China as well as Southeast asia, for instance, Miao (Mong) and Khmer and etc. If a Viet guy goes for a genetic test, the Y-DNA of O3, N1 or Q is likely linked to a Han-Tibetan ancestry. Vietnamese language belongs to AUSTRIO-ASIATIC but 60-80% of Vietnamese words are borrowed from Chinese. I think that's why Viet nationalists hate Chinese so much.