Why did Vietnam's traditional costumes finally become Manchu?

I think it's just the similarity in clothing, and it can't rise to the level of nationalization. Just like the Chinese tunic suit, we can also see the shadow of the suit. Can we conclude that our clothes in China are all westernized?

In fact, some traditional Vietnamese costumes are similar to China in appearance. It can only be said that they have incorporated new things in the process of inheritance.

Maybe this element comes from some clothes in China. Maybe it has nothing to do with our clothes in China. It's just their own innovation in traditional costumes. Just like the costumes in China, each dynasty has its own characteristics.

Although Vietnamese costumes can't be static, they will change with the passage of time, historical evolution, geological reasons and historical and cultural reasons. Everyone knows that Viet Nam is close to China. Then some cultural integration is no problem. Just like our clothes today. Fashion is always changing. No one knows what style the next fashion will lead.