Illustration of roof greening in China and Japan

Quick answer：

Roof greening in China and Japan is a practice that involves planting vegetation on the roofs of buildings. This sustainable practice helps to reduce urban heat island effect, improve air quality, and enhance biodiversity. In Japan, the traditional 'Engawa' (overhanging corridor) is often used for roof gardens, while in China, modern skyscrapers frequently incorporate green roofs as part of architectural design.