The main differenee between Chinese and German green roofs 15 that 80% of the green roofs in Germany are extensive green roofs.In China Extensive Green Roofs are very rare,there are a few trial Projeets, but the advantages of sueh extensive green roofs be- eome more and more elear.Several institutes and orga-- nizations are working on the develoPment of standards regulations. The main differenee between Chinese and German green roofs 15 that 80% of the green roofs in Germany are extensive green roofs.In China Extensive Green Roofs are very rare, there are a few trial Projeets, but the advantages of sueh extensive green roofs be- eome more and more elear.Several institutes and orga-- nizations are working on the develoPment of standards regulations.