This paper has reviewed the provincial differences of population status and the degree of population transition synthetically from three points of view: total fertility rate, expoctation of life, natural growthe rate by using cluster analysis.
Proceed with people's modernization relevant concepts, some basic conception such as the modernization, population, people are differentiated and analyzed correctly, Have expounded the abroad theories about the main theory of the population and development - appropriate population theory and population change theory.
From 20 century 50 years, there are many differences between China population change and West traditional population change. China population change has his own traits: change rapidly; control in intervention;
not steady; not balanced. Controlling the new steady low bearing level is the main measures and means of population change, is important processes to realize population sustainable development.
Its territory is comprised of both relatively developed regions where demographic transition is over, and underdeveloped regions with high natural increase of population where the demographic transition is only just beginning.
One population change noted which has an effect on the suicide attempt rate is the marked increase in-the high risk age group, persons 15-24, reflecting the rising birth rate following World War II.
It is concluded that the ranking of pesticides by their toxicity alone would fail to take into account ecological processes that determine the different patterns of population change following treatment.