According to the exhaust gas emission monitoring center of the Karamay environmental protection agency, the Auto Green Mark Certificate for Karamay residents will expire on Jan 31. People need to apply for the new certificate before then, Karamay Daily reported.

Xinjiang's Urumqi and some other cities out of Xinjiang have employed a traffic restriction policy for cars without the Auto Green Mark Certificate and autos with the yellow certificate, which signifies that the car has higher emissions.

At present, the only auto testing station in Karamay is in Dushanzi district. The new station in Karamay city center might go into operation later this month.