Hunan rains environmental engineering co. Ltd. Sits in the new industrial park of gao, changsha city. Since its inception, the company has focused on the development and creation of new technologies for integrated rainwater use systems, and is now a high-profile enterprise for research and development production, technical advice, sale of equipment and materials, programme design, construction contracting, commissioning, after-sales services. It covers a number of areas, including urban dwellings, schools, municipal works, outdoor greening, industrial parks, etc. As a growing enterprise, the company has a number of departments, including the department of human resources administration, the ministry of finance, the ministry of production, the ministry of markets, the ministry of engineering, the ministry of design and the ministry of commerce, with a strong technical research and development and design team, and a stable and mature installation and construction team. Extensive cooperation has been maintained with prominent domestic and foreign companies, institutions of higher learning and scientific research units, and new technologies are being introduced, digested and absorbed. Based on high-tech technologies with autonomous intellectual property rights and brand names, such as rain-fed rainwater harvesting modules and rain-water disposal technologies, the company has obtained good research results in integrated rainwater use, obtained a total of seven patent certificates and fully marketed the results of research. After receiving the title of "china's self-creating products", "green energy saving products" and being rated as "quality, services, credibility 3a enterprises", "members of the council of the hunan environmental protection association" and "high-technology enterprises", as well as "gb/t1901-2008/iso901:2008 quality management system certification", strategic partnership agreements were signed with multiple real estate companies and government departments and were selected for use by large-scale real estate companies, and long-term stable cooperation was established with many retailers and contractors, and the competitiveness of companies was constantly strengthened。