The company's logo, beijing quest, is a research and development sales company. The company mainly sells mechanical electronics and membrane products and household goods. Operating products include:1 sales of filtration film products and related equipment. Uf-voltaic membrane components and equipment: uf-single membrane components and equipment: uf-film laboratory equipment: its retention of molecules ranging from 1000 to 300,000 dalton to various specifications of the meso-fibre membrane and components of various sizes. The product is widely used in the water treatment, chemical, food brewing, pharmaceuticals, bioengineering and environmental protection industries. 2. School direct drinking equipment. Direct school water solutions are provided for a wide range of primary and secondary schools. The school-based direct drinking system greatly facilitates access to primary and secondary schools and provides healthy drinking water for students. Some primary and secondary schools in bei...