Ho Chi Minh City is a one of the biggest cities of Vietnam. Before 1945, there were about 400,000 inhabitants living in the city. During the last two decades, it became the biggest industrial and commercial center of the country. According to the statistics in 2005, its population was about million people. In the suburban areas of the city, particularly in the northern part, agricultural activities produce the main income of these local residents. Within the last 15 years, due to urbanization and emigration .