Are Vietnamese Han Chinese?

No, looks don't fool people. They are typical faces of Southeast Asia, genetically not belonging to the Han people. Secondly, they didn't inherit the ancient culture of China, but just learned some superficial things, such as Aodai, which is obviously a copy of the cheongsam. Cheongsam is a traditional dress of Manchu people in Northeast Asia, which has nothing to do with China culture, but Vietnamese people have to learn it. In contrast, the Japanese inherited most of China's elegant and vulgar culture of Han and Tang Dynasties, while the Vietnamese only learned the vulgar part of China culture after the Song Dynasty, and felt that they had no aesthetic ability, so as long as they were from China, they had to learn it, which was actually a manifestation of cultural inferiority. In a word, they don't belong to the Han nationality, regardless of nationality or culture.