article 81 of the law of the people's Republic of China on the prevention and control of air pollution

catering service operators who discharge oil fume should install oil fume purification facilities and keep them in normal use, or take other oil fume purification measures to make the oil fume discharge up to the standard and prevent pollution to the normal living environment of nearby residents.

it is forbidden to build, rebuild or expand catering service projects that generate oil smoke, odor and waste gas in residential buildings, commercial and residential complex buildings without special flue and commercial floors adjacent to residential floors in commercial and residential complex buildings.

no unit or individual is allowed to barbecue food in the open air in the area prohibited by the local people's government or provide a venue for barbecue food in the open air.

there is also the emission standard of cooking fume from the catering industry issued by the State Environmental Protection Administration.