> But the borders vietnam shares with those countries are hard borders. You need a visa and pass a government controlled checkpoint when you enter. As someone

> But the borders vietnam shares with those countries are hard borders. You need a visa and pass a government controlled checkpoint when you enter. As someone who lives in Vietnam, I think your conception of the hardness of the borders is mistaken. The land border with Vietnam-China is 1,300 kilometers long. That's longer than Germany's combined border with the Netherlands, Belgium, Luxembourg, and France. "The 1,400km border between Vietnam and China is extremely porous, with a complicated geography characterised by mountains and rivers – especially in the north – that makes it difficult to monitor cross-border traffic, according to Mimi Vu, an independent Vietnamese-American anti-trafficking expert based in Saigon." > Europe (mainland) has no internal borders. There are no checkpoints, customs agents or chokepoints between countries. Yes it does. Germany closed its borders on March 16. https://www.schengenvisainfo.com/news/germany-introduces-border-checks-with-five-other-schengen-members/ https://www.schengenvisainfo.com/news/germany-introduces-bor... France, Spain, and Italy also closed their borders. Something like a dozen countries in the EU closed their borders.