Group 1 - The core idea of the article revolves around the innovative use of mushroom-based paper for university admission letters, highlighting its environmental benefits and potential applications in various industries [9][13][19] - Jilin Agricultural University has developed this mushroom paper, which utilizes mycelium fibers instead of traditional plant fibers, making the production process more efficient and eco-friendly [9][11][13] - The production of mushroom paper can grow in a matter of days to weeks, significantly reducing the reliance on trees and minimizing environmental impact compared to conventional paper manufacturing [13][19] Group 2 - The article discusses a trend among Chinese universities to showcase their technological advancements through creative admission letters, turning the admission season into a competition of innovation [23][38] - Beijing University of Chemical Technology has introduced a high-strength carbon fiber admission letter, demonstrating its durability through various tests [23][25][26] - Other universities, such as Beijing University of Science and Technology and Harbin Institute of Technology, have also included unique materials in their admission letters, showcasing advancements in green steel and aerospace technology [26][30] Group 3 - The article contrasts the current trend of high-tech admission letters with the past, where universities focused more on aesthetics and emotional appeal rather than technological innovation [39][41] - The shift towards showcasing scientific achievements reflects the growing confidence of Chinese universities in their research capabilities, as evidenced by their strong performance in global academic rankings [47][48] - The article emphasizes that the investment in high-tech admission letters is justified by the potential societal benefits and the motivation it provides to new students to engage in research and innovation [50][51]