Group 1 - The article discusses the growing controversy surrounding the use of pre-prepared meals (pre-cooked dishes) in school cafeterias, with parents expressing strong opposition and the Ministry of Education indicating that such practices should not be promoted in schools [6][7]. - The origin of pre-prepared meals can be traced back to the invention of the "quick-freezing machine" in the United States 100 years ago, highlighting the historical context of this food trend [7]. - Research indicates that pre-prepared meals have become one of the fastest-growing sub-sectors in China's food processing industry over the past two years, suggesting a significant market opportunity [7][8]. Group 2 - There is a cultural clash regarding pre-prepared meals, as some believe they contradict traditional Chinese culinary practices, which emphasize fresh cooking methods [8]. - The article mentions that pre-prepared meals are commonly found in convenience stores in Japan, where consumers frequently purchase ready-to-eat options instead of cooking at home [7]. - Despite advancements in production technology, pre-prepared meals still face criticism regarding their nutritional value, indicating potential areas for improvement in product development [8].