SHANGHAI, Jul 1 (SMM) – Fifteen cities and provinces including Hebei, Henan, and Shanxi province introduced stricter standards for automobile emissions on July 1, to clean up the air in the world's largest car market, according to local authorities. 

The detailed regulations varied by areas. In Beijing, heavy-duty gas and diesel-powered vehicles sold in the city should meet the new VI standard on July 1, but light vehicles can comply with the standard from the start of 2020. 

From July 1, Shanghai implemented tougher emissions standard for light-duty vehicles weighing less than 3,500 kg, and banned sales of substandard light-duty vehicles.
 
The new national VI standards will expand to the whole nation by 2020.