As for the questions I came up with. The current situation of wastewater in the Netherlands is generally good. The Netherlands can effectively combine the features of its geography and the utilization of water resources and processing. And many water claiming systems are already existed here. I made some examples in the result section of the report, such as the cycling of fish water. Certainly, if we want to use the wastewater in irrigation of cucumbers, we also need to know the features of the development of cucumbers. And make sure the advantages and disadvantages. Therefore, we can control it effectively.