I can't. After the online Vietnamese dong is purchased in Vietnam, it can be traded between physical stores or banks, and can only be traded in Vietnamese Vietnamese dong that is legally circulated. There are risks such as counterfeit currency risk, outdated currency and inconsistent size when buying Vietnamese dong online. Choose safe and reliable channels, such as banks, regular foreign exchange companies and local foreign exchange exchanges. Don't buy it on some unknown websites or third-party platforms to avoid economic losses. When you go to Vietnam, you can bring enough foreign currency and some credit cards to prevent accidents in the process of buying Vietnamese dong.