Second, there are more career chances in big city rather than a small town. In big city, the salaries, living conditions are always better than those in a small town. So people’s demand for entertaining services as well as employments is also higher, which is a huge opportunity for any company want to increase its profit. As a result, large number of corporations and firms have been establishing in diversified fields of every aspects of the society. For example, in Vietnam, large company such as HP, Prudential or even banks, airports, etc are located in big city, creating a lot of career chances for anybody. While in small town, majority of people are farmer, which is not a well-paid job or they tend to transfer to big city looking for occupations.