Beijing’s environmental watchdog is considering adopting the National VI (B) emission standards ahead of the country’s scheduled time, aiming to reduce vehicle emissions and enhance air pollution control in the capital. The new standard would come into effect in Beijing in 2020 and 2023 nationwide.

With the new standard, major polluting gas from light-duty vehicles, including carbon monoxide and nitrogen oxide, will be reduced by about 50 percent and emissions of particulate matter will be reduced by about 40 percent, according to the bureau.

For heavy-duty diesel-powered trucks, the emissions of nitrogen oxide and particulate matter are expected to drop by more than 60 percent, it said.