Factory environment: ① The main roads in the factory and the roads entering the factory should be paved with hard roads (such as concrete or asphalt roads) suitable for vehicles, and the roads should be smooth and dust-free. (2) the factory should be free of toxic and harmful gases, smoke and dust and facilities that endanger product hygiene. ③ Livestock, poultry and other animals are prohibited in the factory. (4) The discharge or treatment of waste water and waste materials in the production process shall meet the secondary discharge standard stipulated by the State Environmental Protection Administration.

Plant and facilities: ① The workshop is arranged reasonably according to the requirements of process flow, and there is no cross-contamination link. The workshop floor should be flat, smooth and easy to clean. The workshop walls should be covered with light-colored, water-absorbent, water-impermeable and nontoxic materials, and the dado with a height of not less than 1.50 m should be decorated with anticorrosive materials. The roof or ceiling of the workshop should be made of non-toxic materials that are not easy to fall off, and the roof structure should have an appropriate slope to avoid water accumulation. ⑤ The doors and windows of the workshop should be completely sealed and equipped with insect and fly prevention devices. ⑥ The lighting facilities above the production line in the workshop should have explosion-proof lampshades or other safety lighting facilities. ⑦ The packaging workshop should be equipped with ventilation or air conditioning equipment, and the air inlet and outlet should be equipped with devices to prevent pests from invading.

Sanitary facilities: ① There should be disinfection facilities at the entrance and exit of the workshop. (2) the locker room should be connected to the workshop, and spacious and clean. There should be enough lockers and shoe cabinets in the dressing room. (3) the toilet connected to the workshop should be equipped with flushing device and hand washing disinfection facilities, and equipped with washing products and hand dryers. The bathroom should be kept clean and sanitary, and doors and windows should not be directly opened to the workshop.

For more details, you can check that there is a Lixing in Kaifeng. They are more professional.