The nominal base temperature of the cold chain of frozen food is below -18℃, and the limit of temperature rebound during transportation is -15℃, and it is required to be reduced to -18℃ as soon as possible. The temperature inside the compartment should be pre-cooled to below -10℃ before the refrigerated truck is loaded with goods. Frozen food with temperature over -12℃ is rejected. Frozen display cases should be kept below -15℃ after loading, and the temperature should not rise above -12℃ for a short period of time.

Legal basis:

"The Chinese People's **** and the State Food Safety Law"

Article 1 In order to ensure food safety, to protect the public health and safety of life, the formulation of this law.

Article 2 shall comply with this Law when engaging in the following activities within the territory of the People's Republic of China*** and the People's Republic of China:

(1) food production and processing (hereinafter referred to as food production), food sales and catering services (hereinafter referred to as food business);

(2) the production and operation of food additives;

(3) packaging materials, containers, detergents used for food, disinfectants, and tools and equipment used for food production and operation (hereinafter referred to as food-related products);

(d) the use of food additives and food-related products by food production and operation;

(e) the storage and transportation of food;

(f) the safety management of food, food additives and food-related products.

The quality and safety management of primary products originating from agriculture for consumption (hereinafter referred to as edible agricultural products) shall comply with the provisions of the Law of the People's Republic of China on the Quality and Safety of Agricultural Products. However, the market sale of edible agricultural products, the formulation of relevant quality and safety standards, the publication of relevant safety information and the provisions of this Law on agricultural inputs shall be complied with.

Article 3 food safety work to implement prevention-oriented, risk management, the whole process of control, social **** governance, the establishment of scientific and strict supervision and management system.

Article 4 of the food production and operation of food production and operation of food safety is responsible. Food production and operation shall be in accordance with the laws, regulations and food safety standards for production and operation activities, to ensure food safety, integrity and self-discipline, social and public accountability, accept social supervision, social responsibility.

Article 5 of the State Council to establish a food safety commission, its duties shall be prescribed by the State Council. Food and drug supervision and management department of the State Council in accordance with the provisions of this Law and the State Council's responsibilities for the supervision and management of food production and business activities. The State Council administrative department of health in accordance with this Law and the State Council's responsibility to organize and carry out food safety risk monitoring and risk assessment, in conjunction with the State Council food and drug supervision and management departments to develop and publish national standards for food safety.