In 2019, the Vietnam Consulate moved into a new building and the visa rules changed.
Location of Vietnam Consulate in Savannakhet
The Vietnam Consulate moved in the very beginning of 2019 into a new building (on the photo).
At the old location, they left a weird map to show where to go. It looks like a map but it works as a sign so don't think the North is on the top of the map... Just follow arrows as if it was a road sign... Otherwise, you will walk long like me ...
The address of Vietnam Consulate in Savannakhet, Laos is