Using data from 2010 census, this paper constructs a discrete development model and predicts the age and gender structure of never married population from 2010 to 2060 separately for China's urban and rural areas. Spousal sex ratio index of marriage is used to measure the marriage squeeze of never-married men, and this study also decomposes the impacts of age structure, gender structure and spouse age differences on marriage squeeze by urban and rural areas. The results show that, from 2010 to 2060, the urban-rural difference in marriage squeeze of never-married men shows a fluctuating trend. The urban-rural gap will drop gradually till 2025, then rise steadily to 2050 and start to drop again. The urban-rural difference in gender structure contributes largely to the urban-rural disparity in marriage squeeze of never-married men. The implementation of the universal two-child policy might alleviate the marriage squeeze, while ruralurban migration exacerbates the rural-urban disparities in marriage squeeze. The government should take necessary measures as soon as possible to improve the effect of the universal two-child policy and pay attention to the influence of rural-urban migration on the marriage squeeze of rural men.

This paper examines changes of population pressure on the ecological environment and its spatial variation in China． Data are collected from the statistical yearbooks of 31 provincial administrative areas in 1990，1995，2000，2005 and 2010. Using a geographic information system ( GIS) and relevant models，this paper analyzes trends in the population pressure on ecological environment and the change of the gravity center of ecological environment quality in China． Generally，population pressure on the ecological environment in China is becoming higher，population and environment has been in serious imbalance，and the ecological environment is suffering from serious pollution． While population pressure on the ecological environment is becoming lower in some areas，the ecological environment is getting worse． Areas of super high population pressure on the ecological environment include Beijing，Tianjin and Shanghai． There is a far distance between the gravity center of population pressure on the ecological environment and the gravity center of ecological environment quality，but the general trend is that they are moving from West to East China．Finally this paper discusses policy suggestions on improving ecological environment quality．