Group 1 - The 24th China Changchun International Agricultural and Food Expo serves as a significant platform showcasing the latest trends in China's agricultural transformation towards smart, green, and low-carbon practices [1] - The expo features a large smart agricultural machinery section with over 200 domestic and foreign companies presenting advanced technologies such as hydrogen fuel autonomous tractors and laser weeding machines, indicating the future direction of the agricultural machinery industry [1] - The first "5G + hydrogen fuel" autonomous tractor in China is highlighted at the expo, capable of automatic driving and remote operation in complex terrains, showcasing advancements in agricultural technology [1] Group 2 - The cost of operation for new low-carbon agricultural machinery is approximately 2 yuan per mu, significantly lower than traditional diesel engines, reflecting the growing interest in clean energy applications in agriculture [2] - Innovations such as the carbon dioxide laser weeding machine, which uses AI vision systems to identify and eliminate weeds without chemical herbicides, align with the increasing demand for environmentally friendly agricultural solutions [2] - The exhibition demonstrates a wide range of smart agricultural products, some of which are already implemented in smart agricultural parks across China, indicating a new phase in the promotion of intelligent agricultural machinery [2]