18+污漫画,亚洲国产港台日韩欧美三级电影网,办公室扒开奶罩揉吮奶明星,爱爱电影爱情影院网,斗破苍穹 小说免费阅读全集,人妻洗澡被强伦姧完整,打扑克牌又疼又叫视频软件,亚洲,日韩,aⅴ在线欧美,寂寞少妇扒开双腿猛烈进入免费看

Opinion: ? Cartoons ? Columnists ? Editor's Pick ? From the Blog ? Submit Your Opinion
Mu Guangzong
Professor and Ph.D Supervisor of Population Research Institute, Peking University, and also the Syndic of China Population Association and the Gerontological Association of China. His main research interests are Institutional Demography, Social Gerontology, Population and Sustainable Development.
March 25, 2011
Ease one-child policy conducive to national development
Analyses show that a fertility rate of 1.8 is a sustainable population growth rate in China, meaning each couple in the countries should be allowed to have two children.
1  2  3  



Send your storiesGet more from China.org.cnMobileRssNewsletter