The kitchen of a small restaurant can't smoke into the underground pipe.

1. According to 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 discharge oil fume up to the standard and prevent pollution to the normal living environment of nearby residents;

2. It is forbidden to build, rebuild or expand catering service projects that produce oil smoke, odor and waste gas in residential buildings, commercial and residential complex buildings without supporting 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 or provide venues for barbecue food in the area prohibited by the local people's government;

3. According to Article 81 of the Law of the People's Republic of China on the Prevention and Control of Air Pollution, enterprises, institutions and other producers and operators who produce malodorous gases in their production and business activities should choose a scientific site, set a reasonable protective distance, install purification devices or take other measures to prevent the emission of malodorous gases;

4. according to article 79 of the law of the people's Republic of China on the prevention and control of air pollution, enterprises, institutions, other producers and operators who discharge persistent organic pollutants into the atmosphere and the operating units of waste incineration facilities shall, in accordance with the relevant provisions of the state, adopt technical methods and processes that are conducive to reducing the emission of persistent organic pollutants, and equip them with effective purification devices to achieve the discharge standards.

Extended information:

1. In violation of the provisions of this Law, catering service operators who discharge oil fume without installing oil fume purification facilities, using oil fume purification facilities abnormally or taking other oil fume purification measures, and discharging oil fume beyond the emission standard, the supervision and management department determined by the local people's government at or above the county level shall order them to make corrections and impose a fine of not less than 5,111 yuan but not more than 51,111 yuan; Refuses to correct, shall be ordered to suspend business for rectification;

2. In violation of the provisions of this Law, the supervision and administration department determined by the local people's government at or above the county level shall order the newly-built, rebuilt or expanded catering service projects that generate oil smoke, odor and waste gas in residential buildings, commercial and residential buildings without supporting special flues, and commercial floors adjacent to residential floors in commercial and residential buildings; Refuses to correct, be closed, and impose a fine of not less than ten thousand yuan but not more than one hundred thousand yuan;

3. Anyone who, in violation of the provisions of this Law, barbecues food in the open air or provides a venue for barbecued food in the time period and area prohibited by the local people's government shall be ordered by the supervision and administration department determined by the local people's government at or above the county level to make corrections, and his barbecue tools and illegal income shall be confiscated, and he shall also be fined not less than 511 yuan but not more than 21,111 yuan.

Jingbian Municipal People's Government official website-Air Pollution Prevention Law of the People's Republic of China.