Based on data from Chinese General Social Survey and Survey of Life Histories and Social Change in Contemporary China, this paper examines the trend of educational assortative mating in mainland China by using log-linear model. The results reveal an N-shape fluctuation. From 1949 to 1954, educational homogamy grew dramatically, while it dropped gradually from 1955 to 1984. Since 1985, educational homogamy has again increased rapidly. Long-distance educational heterogamy was common during the period of the Cultural Revolution, while it was rare before and after the Cultural Revolution. Further, the marriage between people with high school and middle school education and those with primary school or lower degree, which was mainly driven by public policy, was more prevalent in the early years of the People's Republic of China, the period of Cultural Revolution and the early years of reform and opening up, and peaked during the Cultural Revolution.

Longevity risk calculation is central to both public pension plans and life insurance companies. The essential work in quantifying longevity risk is to model the dynamics of mortality rates. Based on the goodness-of-fit with respect to the available mortality rates at various ages, the dynamic mortality rate models mainly deal with two issues, namely, age extrapolation and trend prediction. In addressing the gaps in the literature, this paper integrates the extreme modeling method for oldest-old mortality rate and the hierarchical modeling technique, and proposes a dynamic mortality rate modeling approach. The paper further demonstrates the dynamic evolutions of old-age and oldest-old mortality rates by place of residence and gender from 2000 to 2010 in China, with better measurement of the tail risks of the life span distribution, and thus improves the quantitative method on China's longevity risk research.