Yen Bai is a Province in the North of Vietnam with a population of almost 800,000. The capital of Yen Bai is Yen Bai (City), which is around 3 hours by car from Hanoi.
The regional gross domestic product per capita (data 2011, at prices 1994) was 5,6 million VND (or less than USD 270) compared to a nationwide average of more than USD 1,370 (2011).