Group 1 - The core viewpoint of the article emphasizes the importance of cold storage and preservation technology for seasonal fruits in Guangdong to enhance the quality of agricultural products and promote high-quality industry development [1] - The "Digital + Light Cavalry" initiative by the Guangdong Provincial Agricultural Technology Promotion Center aims to provide training on cold storage and preservation facilities for agricultural products [1] - The training course includes specialized sessions on pre-cooling and preservation techniques for seasonal fruits, particularly citrus fruits, highlighting the stringent environmental requirements for preservation [1] Group 2 - Citrus preservation requires careful management of temperature, humidity, gas environment, and the maturity of the fruit to minimize microbial growth [1] - Effective orchard management, precise grading during harvest, and proper disinfection and packaging are essential for comprehensive protection of citrus fruits [1] - For packaging, options include insulated boxes that reduce mechanical damage and maintain temperature, as well as e-commerce logistics boxes that offer strong control performance [3] Group 3 - Mushroom preservation can be achieved by lowering respiration and transpiration rates to inhibit harmful microorganisms and delay decay [4] - The preservation techniques for mushrooms focus on three main aspects: regulating the respiration and metabolism rates of edible fungi, inhibiting microbial activity, and controlling internal moisture evaporation [4]