Group 1 - Starting from September 16, 2023, the use of reconstituted milk in sterilized milk is prohibited, requiring only raw milk as the ingredient [1] - The new regulation aims to enhance the nutritional value and taste of milk, as reconstituted milk undergoes multiple heat treatments that reduce active calcium and lactoferrin content [1] - Major dairy companies like Guangming Dairy and Yili have already transitioned to using only raw milk, with no reconstituted milk found in their products [1][2] Group 2 - The impact of the new national standard on most dairy companies is minimal, as many large enterprises had already stopped using reconstituted milk due to an oversupply of raw milk and declining prices [2] - Historically, the use of reconstituted milk was more common when there was a shortage of raw milk, but current market conditions have shifted, making it unnecessary for large companies to revert to this practice [2]