GAC Motor Co. and Geely Automobile Holdings are upgrading the technology in air filtration systems to protect vehicle occupants from the deadly coronavirus. 

GAC said it will upgrade the system for free for existing car buyers. And starting next month, vehicles will be fitted with the upgraded system before delivery, GAC said Sunday. 

GAC said the upgraded filtration capability matches that of an N95 face mask. 

The face mask, typically used by medics, is believed to be able to block more than 95 percent of particles measuring 0.3 microns and above. 

Geely said last week it was developing an intelligent air purification system with filtering capability on par with that of an N95 face mask.  

Geely expects to complete development of the system before the end of the month and start mass procuring it around March 10.