Other cities can learn from London's drive for clear air

London's strategy to become the world's first city to create an ultra-low emission zone is a valuable idea for Beijing to consider.

The strategy includes measures on cooperation with vehicle producers and other industries to invest, upgrade technology and reduce emissions.

"The world's first ultra-low emission zone will come into force on Sept 7, 2020, following a consultation on the proposal earlier this year," Mayor Boris Johnson confirmed on Thursday.