people工people certificate website security marketing promotion 1 beijing qifei technology development co., ltd. is a high-tech fine chemical enterprise specializing in the research, development, production and sales of water-based additives. the company has r&d bases at home and abroad, and the r&d team is composed of many professional doctoral students. the products are widely used in coatings, inks, wall-coated diatom mud, building materials, adhesives, water treatment and other industries. telephone 30 moon