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According to the Beijing Municipal Ecology and Environment Bureau, starting from December 1, Beijing will implement three key policies: the \"Jing 6B\" standard for gasoline and diesel, the National IV emission standards for non-road mobile machinery, and an expansion of the areas where high-emission machinery is prohibited. These measures are aimed at further improving the management of mobile pollution sources and promoting continuous improvements in air quality. The first batch of \"Jing 6B\" fuel has been made available for sale. From January to October this year, the average PM2.5 concentration in Beijing was 32 micrograms per cubic meter, keeping the city among the best in the \"2+26\" cities in the Beijing-Tianjin-Hebei region and its surrounding areas. Nevertheless, since the industrial structure, energy structure, and transportation structure in the Beijing-Tianjin-Hebei region have not changed fundamentally, the overall level of pollution emissions remains high, and the improvements in air quality are not yet stable. Once the weather conditions are unfavorable, severe pollution episodes are likely to occur. According to the latest results of PM2.5 source analysis, mobile sources remain the primary source of pollution contributing to PM2.5 levels in Beijing. To control pollution from mobile sources, Beijing has taken multiple measures targeting aspects such as vehicles, fuel, and roads. In terms of vehicle fuels, local standards for vehicle fuels named “Beijing 2”, “Beijing 3”, “Beijing 4”, “Beijing 5” and “Beijing 6” were implemented in 2004, 2005, 2008, 2012 and 2017 respectively, achieving good results in emission reduction. International experience also shows that upgrading vehicle fuels can significantly reduce vehicle pollution emissions. Compared to the current \"Jing 6\" fuel standard, the \"Jing 6B\" standard imposes stricter limits on the olefins, aromatics, and boiling range of gasoline, as well as on the polycyclic aromatics and boiling range of diesel; it also introduces new limits for certain harmful substances. It is expected that the use of the \"Jing 6B\" fuel will reduce particulate emissions from gasoline vehicles by 20% to 30%, hydrocarbons by 10% to 15%, and carbon monoxide by 6% to 10%. Diesel vehicle particulate emissions can be reduced by 20%, while nitrogen oxide emissions can be cut by 10%; this will play an important role in improving air quality and achieving simultaneous reductions in fine particulate matter (PM2.5) and ozone. Regarding gasoline: tighten the limits on olefin content. Reducing the olefin content will decrease the formation of gums, thereby reducing carbon buildup in the engine and helping to lower emissions of hydrocarbons and particulates. Stricter limits on aromatic hydrocarbon content have been imposed. Reducing the aromatic content will decrease carbon buildup in the engine’s intake system and combustion chamber, which helps to reduce emissions of hydrocarbons and carbon monoxide. Stricter limits have been set for the 50% evaporation temperature, 90% evaporation temperature, and final boiling point of gasoline. Reducing the boiling range can significantly decrease the content of heavy components in gasoline, improve the combustion performance of vehicles, and help reduce emissions of hydrocarbons, carbon monoxide, and particulates. The limit values for substances such as chlorine and silicon have been increased, which helps to prevent the addition of harmful substances. Regarding diesel: tighten the limits on polycyclic aromatic hydrocarbon content. Reducing the content of polycyclic aromatic hydrocarbons can significantly decrease particulate matter precursors and reduce nitrogen oxide emissions. Stricter limits have been set for the 50% distillation temperature, 90% distillation temperature, and 95% distillation temperature of diesel. Reducing the boiling range can decrease the content of heavy components in diesel, improve combustion performance, and reduce particulate emissions. The requirement that “no additives or contaminants whatsoever—such as halogens, silicon-containing or phosphorus-containing compounds—that could impair the normal operation of vehicles shall be added” has been added; this helps to prevent the addition of harmful substances. Meanwhile, Beijing will also implement the National Stage IV emission standards for non-road machinery, adding requirements such as limits on the number of particulate matter particles ； Expand the areas designated as low-emission zones for non-road machinery: broaden the prohibition areas in 7 zones and add 3 new types of prohibited equipment. A responsible official from the Beijing Municipal Ecology and Environment Bureau said that during the autumn and winter campaign, Beijing will continue to work on phasing out old vehicles with high emission levels and replacing vehicles in key industries with those powered by new energy sources. To date, the city has phased out 99,000 National III standard gasoline vehicles, and promoted the use of 485,000 new energy vehicles. For drivers in the capital, switching to Jing 6B fuel will not result in any significant change in fuel consumption, but it does **reduce the emission of pollutants**. According to real-vehicle test data provided by the China Automotive Technology and Research Center, it is estimated that after using “Beijing 6B” fuel, particulate matter emissions from gasoline vehicles will decrease by 20%–30%, hydrocarbon emissions by 10%–15%, and carbon monoxide emissions by 6%–10%. Diesel vehicle particulate emissions can be reduced by 20%, and nitrogen oxide emissions by 10%. The widespread use of Beijing VI B fuels will play a crucial role in hosting a green Winter Olympics, improving air quality in the capital, and achieving coordinated reductions in fine particulate matter and ozone emissions. At the same time, the replacement of the “Jing 6B” fuel standard does not involve any price adjustments at present; the price of “Jing 6B” remains the same as that of “Jing 6”. As a major producer of motor gasoline in Beijing, Sinopec Yanshan Petrochemical has already completed the system conversion to produce gasoline meeting the “Beijing 6B” standard ahead of schedule. Starting December 1, it will officially supply “Beijing 6B” gasoline to the Beijing market. According to officials from Yanshan Petrochemical, compared with the current \"Jing 6\" gasoline standard, the \"Jing 6B\" standard sets stricter limits on parameters such as the content of olefins and aromatics, as well as the dry point of gasoline. Based on relevant test data, it is estimated that the use of \"Jing 6B\" gasoline can reduce particulate emissions from gasoline vehicles by about 20%, and hydrocarbons and carbon monoxide emissions by 10%, thereby significantly improving air quality. At present, the Beijing gas stations under Sinopec are undergoing fuel replacement. At PetroChina Beijing Sales Company, the replacement of gasoline and diesel meeting the “Beijing 6B” standard has been completed at two oil depots and over 130 company-operated gas stations. To facilitate customer identification and staff operation, CNPC Beijing Sales Company has added the “Jing 6B” labeling to the fuel pump displays and fuel nozzle tags. The corresponding fuels are black 98-octane “Jing 6B” gasoline, green 0-octane “Jing 6B” diesel, orange 92-octane “Jing 6B” gasoline, and red 95-octane “Jing 6B” gasoline.