Yan Ping, NPC deputy and chairman of Guangxi Yuchai Machinery Group Co Ltd. [Photo/CFP]

"The different emissions standards of Capital VI and National VI will raise the cost of research and development for the auto industry. There should be a unified Capital VI and National VI emissions standard.

The implementation date of the National VI emissions standard should also be postponed to 2022.

The government should release the National VI emissions standard as soon as possible, so companies have enough time to do research, development and verification.

Companies that need to upgrade their products to meet National VI emissions standards should receive subsidies."