SUNTY-ECO(Qingdao) founded in 2012, formerly known as Green Tech Co., and in 2018 establish SUNTY-ECO TECH company with Dr. Yin graducated from Beijing Tech University and Tsinghua University, mainly engaged in environmental technology development and manufacturing, from the beginning of solar energy products including solar thermal products (solar water heaters and accessories, Solar water heating system collector and accessories) to the development of solar PV application products (solar specific module components, Solar PV power system, solar ice cream dolly, solar vehicle refrigerator and freezer etc., as well as new materials (plastic materials, Sweden storage salt), doing import and export trade.