Cultivate in spring and work in summer, harvest in autumn and store in winter. Winter is also a season to enjoy harvest. "Beginning of winter makes up for winter, filling the mouth". In this low temperature season, some areas in the north have started heating, so indoor air cannot be well recycled. At this time, air filters are used in many places to purify the air. The most important component is the supporting air filters, The particulate pollutants in the air are intercepted and captured by the special fiber tissue of the filter material, so as to purify the air.

Founded in 2007, Shanghai Junkai Environmental Engineering Co., Ltd. is a comprehensive high-tech company integrating R&D, production, engineering construction and technical services. Its subsidiaries include Shanghai Junkai Environmental Protection Technology Co., Ltd., Shanghai Junzhikai Chemical Co., Ltd. and Changzhou Junkai Environmental Engineering Co., Ltd. Junkai Environment devotes itself to the comprehensive treatment of industrial gases and industrial water bodies, the clean treatment of living environment air such as home and office, the integrated manufacturing of environmental protection treatment systems, engineering construction and services, and the production and supply of environmental protection products. Junkai Environment has advanced air filter manufacturing equipment, clean production workshop, and passed ISO9001 quality management system certification and ISO14000 environmental management system certification. The household formaldehyde and haze removal filter element, HEPA filter, activated carbon formaldehyde removal filter and filter screen produced by Junkai Environment have been widely used in the field of air purification in domestic fresh air fans, purifiers, residential buildings and other living scenes.