China is aging at an extraordinary speed and has the largest quantity of elderly persons in the world. Scholars utilize this unprecedented living experience of human being and the unique Chinese Longitudinal Healthy Longevity Survey (CLHLS) datasets with the aim to answer in this volume the following questions critical to the aging population world wide. Is the period of disability compressing or expanding with increasing life expectancy and what factors are associated with these trends in the recent decades? Is it possible to realize morbidity compression with a prolongation of the life span in the future? The first section of the book presents the CLHLS project's study design, sample distribution, contents of data collected, and assessments of age reporting and data quality. The remaining chapters are grouped into sections dealing with the demographic, social, economic, familial and psychological dimensions of healthy longevity. This volume contributes to the development of scientific knowledge related to the "slowing down" of the pace of progression of morbidity with mortality declines at older ages.Research findings reported in this book are instrumental in the ultimate realization of the long-term dream of healthy longevity, that is, not only living longer, but living a healthier life.