There are many ways to invest, the best being to buy land and be a farmer. Or buy land and lease it out or get a tractor dealership some place.
Vietnam would be a great place to be a farmer! Most nations with good land, good weather, and good soil would be great to be a farmer.
Go to the Congo, go to Ethiopia, go to Angola. There are plenty of places where you can buy land and do things. Even in China you can have a 60-year lease, which isn’t great, but it is better than a 2-year lease or no lease. There are opportunities, but the best is to buy land and become a farmer. You can also open a restaurant or tractor dealership in agricultural areas that will start to do better.