Vietnam’s numbers are incredible and I cheer for them, but I wouldn’t trust their exactness, given the country’s placement in the freedom of the press index as the 4th least free.
I admit I find it hard to believe that a country bordering china could handle this so well. But I am more inclined to believe the numbers are real than that the numbers are completely fake and nobody has produced any evidence of this.
Vietnam isn't North Korea. It's a country well connected to the world, plenty of people work there that have international connections or come from other countries.