The article discusses how China is working on dividing up areas based on how ecosystems help people. The researchers focus on figuring out where ecosystems are and how they are affected by human activities. They say just having natural areas isn't enough; we need to consider how people use and value them. They look at ecosystems in terms of their complex structures and how they interact with humans. The study suggests using watersheds to divide up ecosystems in China and figuring out which functions are the most important. The key points are dividing ecosystems into units, checking how well they are doing, dividing them up based on their functions, and recognizing which functions are the most vital.