To the problem brought that human capital is measured only by the level of education during the study of human capital to north west China, through the introduc
<正>Shanghai is the first city in China to enter the aging society. In 1982, the aging population there accounted for 11.51% of the total population. According
<正>In 2000,the China Family Planning Association(CFPA)in collaboration with the Program for Appropriate Technology in Health (PATH)began an adolescent health e