Chapter 1 Introduction: International Cooperation for Sustainable Demographic Development in Germany, China and Beyond.- Chapter 2 Demographic Challenges in Germany and China.- Chapter 3 Care Education - Supporting the Elderly.- Chapter 4 Care Insurance - Preparing for an Aging Society.- Chapter 5 Sustainable and Integrative Cities - How to become age-friendly.- Chapter 6 Conclusion: Lessons-learnt and way forward for the international cooperation.