@durskir
In China, the high concentration of carbon monoxide (CO) is due to industrial activity, electricity production and heating mainly based on coal.
https://earthobservatory.nasa.gov/global-maps/MOP_CO_M
(See maps of CO concentration per month between 2000 and 2017 around the globe)
By the way, on the map you have shown you see the wildfires in West part of USA