Can Cambodia, Vietnam, Laos and Myanmar use US dollars, that is, can US dollars (US dollars) or RMB be exchanged for local currencies or paid directly in US dollars?

Yes, dollars are used all over the world. After you go, you can change dollars into local currency. Sometimes when the price is settled, you can pay directly in dollars.

Note, however, that these countries are a little annoyed, that is, it is difficult for both the official and underground Blackstone to pay off the old banknotes. You'd better try to change some new money and take it there, and it's best to have small change, because it's very troublesome to change, and sometimes you need to tip or bribe people there, and it's even more troublesome without small change.

If you can't find dollar change, it is also feasible to bring some RMB. Although RMB is not universal, they basically know it. You can use 5-20 yuan denominations as tips, provided that you don't take the old ones.