The event features 220 stalls showcasing furnishings, clothes, footwear, food, handicrafts and high-tech products, among other commodities.
It entails an exhibition of 120 photos on the Mekong Delta in terms of socio-economic growth, landscape and residents. A plant and animal exhibition is also taking place.
The fair runs through to May 2, serving local demand for shopping and entertainment during the upcoming national holiday, with musical concerts staged every night.
Vietnam will enjoy a four-day holiday from April 30 to May 3 in celebration of the 41st anniversary of the Southern liberation and national reunification (April 30), and the 130th International Labour Day (May 1).