"Friends circle blue sky" schedule to extend the empty net is still useful?

The weather has improved, and the smog has gradually cleared up. As a result, the air purifier industry, which once thrived on smog-related concerns, is now entering the "post-smog" era. Since winter began, many people in northern China have noticed a significant difference in air quality this season. In previous years, after heating started, smog would often linger for days or even weeks. However, this year, Beijing hasn’t experienced a real "smog day." The public is celebrating the sudden improvement in air quality, with social media flooded with posts about the clear skies. Yet, at the same time, there’s a growing concern: will this good weather last? According to the "2017-2018 Autumn and Winter Air Pollution Comprehensive Management Action Plan for Beijing-Tianjin-Hebei and Surrounding Areas," by the end of October this year, the "2+26" cities were required to complete the "coal-to-gas" and "coal-to-electricity" conversions, aiming to replace over 3 million coal-burning households. Industry insiders believe that the promotion of the "coal-to-clean energy" policy is the key reason behind the extended "blue sky" period in the Beijing-Tianjin-Hebei region. Looking ahead, with more environmental policies being implemented, smog days are expected to become even rarer. But as the number of smog days decreases, some might wonder: what will happen to household appliances like air purifiers? Once seen as the "private doctor" for smog, will air purifiers still be necessary in a cleaner environment? "Blue Sky" Equals "Good Air Quality?" In the eyes of most consumers, good air quality directly correlates with the use of air purifiers. To test this assumption, we looked at real-time data from Beijing between November 18 and December 17. The Air Quality Index (AQI) ranged from 23 to 193. According to Chinese standards, AQI levels above 115 are considered "light pollution." Over the 30-day period, only 4 days fell into the "light pollution" category. However, when comparing with the stricter U.S. standards, the situation looks different. If we convert the data, the U.S. defines AQI below 50 as "mild pollution." Using this threshold, there were 15 days where the air quality exceeded "light pollution," including 4 days of "moderate pollution." So while the skies may appear clear, the air quality is still far from ideal. Air Purifier Is It Only Useful for Smog? Many Chinese consumers associate air purifiers with smog removal—specifically, PM2.5. This has led to the belief that without smog, air purifiers are useless. But this is not entirely accurate. Air purifiers are actually imported products designed for a broader range of purposes. In foreign markets, they are used for humidification, allergen removal, ion sterilization, and odor elimination. Moreover, air purifiers play an important role in reducing the spread of viral flu. While they don't kill viruses directly, they can capture particulate matter, which often carries viruses. These viruses then get trapped in HEPA filters and lose their activity over time, reducing the risk of respiratory infections. Air Pollution Not Only Smog While documentaries like Chai Jing's "Under the Dome" raised awareness about smog, Other traditional pollutants such as car exhaust, formaldehyde, and volatile organic compounds (VOCs) from home decoration remain significant. Odors from household waste, secondhand smoke, and even pollen and catkins in spring and summer also contribute to indoor air pollution. As people increasingly focus on health and well-being, air purifiers are becoming essential for every household. Although air quality in the Beijing-Tianjin-Hebei region has improved, it’s still important to monitor air conditions, especially as work resumes after the holidays and major projects restart. Though the sources of air pollution vary, air purifiers can effectively address them. The new national standard GB/T 18801-2015 specifies CADR (clean air delivery rate) and CCM (cumulative purification amount) for gaseous pollutants, offering clear guidelines. Experts recommend choosing products based on the "three highs and one low" principle: high CADR, high CCM, high energy efficiency, and low noise. Opting for higher-grade models ensures better performance in filtering daily air pollutants.

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