My understanding refers to the process of transforming waste organic matter into fertilizer through microbial fermentation under artificial control and certain moisture, C/N and ventilation conditions.

Through the composting process, the organic matter changes from unstable state to stable humus, and its compost products are free of pathogenic bacteria, weeds and seeds, odorless and fly-free, and can be safely treated and preserved. It is a good soil improver and organic fertilizer.