Prime Minister Nguyen Tan Dung left Hanoi Monday for a six-day trip to China during which he will attend the World Expo Shanghai 2010.
The PM will also visit Zhejiang and Jiangsu provinces.
The international expo, which is scheduled to kick off in Shanghai on May 1 and last till October 31, is themed "Better City, Better Life."
It will feature new approaches to human habitat, lifestyle and working conditions as well as ways to create an eco-friendly society, organizers say.
The event is expected to draw the participation of some 200 countries and international organizations around the world and receive about 70 million visitors.