In recent years, air purifiers have gradually become popular, starting from the haze that began in 2014, which has sparked unprecedented attention to air governance and purification in the Chinese market. Purifiers have become hot selling products at this time. Since the emergence of smog, media publicity has focused on particulate matter. Major brands and businesses have launched purifiers with filters to remove PM2.5, including Philips, Xiaomi, and Honeywell purifiers···
