4. China's feudal culture valued men over women, resulting in the imbalance between the male and female population. So some Chinese men go to Vietnam and marry Vietnamese women. This is another reason. Some Chinese people have Vietnamese ancestors and look like Vietnamese because they are actually Vietnamese.
4.中国封建文化重男轻女，导致男女人口失衡。所以一些中国男人去越南，娶越南女人为妻，这是另一个原因，一些中国人有越南祖先，看起来像越南人，因为他们实际上就是越南人。