2. In our country, roof greening has not been popularized because of the property right of the roof and the structure of the house. If you want to grow vegetables on the roof, you must stipulate your rights and obligations to avoid not answering necessary disputes in the future. We should also try our best to avoid building a permanent greenhouse, lest we need to demolish the property. At the same time, we should also do a good job in preventing backwater on the roof, fully reinforce vines, and avoid strong winds blowing downstairs and injuring pedestrians.