Core Viewpoint - The Guangdong Provincial Agricultural Technology Promotion Center is launching a series of courses focused on cold storage and preservation technologies for agricultural products, specifically targeting the efficient cultivation and preservation of vegetables like "cai xin" (Chinese flowering cabbage) [6][9]. Group 1: Course Details - The third session of the "Digital + Light Cavalry" series will feature experts from South China Agricultural University and other institutions discussing advanced techniques in vegetable cultivation and preservation [6][7][9]. - The course will cover topics such as pre-cooling, preservation, and drying technologies for vegetables, aiming to enhance agricultural productivity and efficiency [9]. Group 2: Key Techniques in Vegetable Cultivation - Key points in the cultivation of "cai xin" include soil management, selection of high-quality and disease-resistant varieties, and the use of functional seed coating technology to enhance pest resistance [16][18]. - The implementation of physical barriers, such as insect nets, is recommended to prevent pest damage, along with soil restoration practices to maintain soil health [18]. Group 3: Drying Technology - The presentation included a demonstration of drying machines that can precisely control temperature and humidity, with heat pump dryers being particularly effective for drying "cai xin" and other vegetables [20][21].