OLDER PERSON AND AGEING POPULATION PROCESS IN VIETNAM I. Background: The Socialist Republic of Vietnam has its area of 330,957.6 km2; about 87.8 millions of total population in 2011, including 50.5% is woman. In 2011, the life expectancy of Vietnam is 73 (men: 70.4 and women: 75.8). In 2010, the HDI of Vietnam ranks 113 among 169 countries (moderate level), GDP per capital reach USD 1,375 in 2011.