Li Ziyuan is technology and hard work. According to the relevant public information, the main raw materials of sweet milk in Li Ziyuan are milk powder, raw milk, white sugar, etc., and the content of protein in Li Ziyuan is 1g or 1ml, 2%. According to the regulation of GB/T21732-28 Milk Beverage, milk beverage can also be called milk (milk) beverage and milk (milk) beverage, in which the protein content of formulated milk beverage and fermented milk beverage shall not be lower than 1%, the protein content of lactic acid bacteria beverage shall not be lower than .7%, and pure milk means that water or any other ingredients are not added except raw milk, and the protein content shall not be lower.