This regulation comes from the health part of article 5 of the standardized management measures for patriotic health work of central state organs (for Trial Implementation).
Other provisions related to the hygiene part of food production and sales:
The floors, walls and cooktops of food processing and production rooms and food washing and disinfection rooms should be decorated with waterproof and acid-base resistant materials, and the ceiling should be waterproof and mildew-proof, so that the exhaust hood is free of oil, mildew, dust, paint removal, food residues and oil droplets.
Processed food should be cooked through one-stop, ensuring "four customs": (one washing, two brushing, three washing and four disinfection) and "four isolation": (raw and cooked food, finished semi-finished products, food sundries and medicines, food and natural ice are stored separately); Food raw materials are fresh, classified and framed, separated from the wall, dust-proof and fly-proof.
Tools, utensils and refrigeration of raw and cooked food should be separated from raw and cooked food, knives should not rust, noodles should be real, lids should be clean, and positive and negative signs should be obvious. Side dishes and side dishes should be dedicated and clearly marked to prevent cross-contamination.