It's a little different with us. Her sister has a family in China (Hohhot) and her parents sometimes live with us (for several years at a time) and sometimes over there. Whoever they live with supports them completely, and get their pensions. So the flow is reversed from what you describe, but the basic principle of shared financial resources and support is the same. e.g. My wife's parents own two flats in China and the revenue from them go to the Chinese branch of the family. We all know basically what everyone else earns and the money from the 'apex' of the family tree goes where it makes best sense. In contrast on my English side, every family unit is discrete. My parents helped us with the purchase of our first house, it's not that there's a lack of generosity in any way, but arrangements are on the basis of one-time gifts. The Chinese way is continuous real-time resource management but in service of a very long term view.