牛奶不纯装纯加了添加剂
[niú năi bù chún zhuāng chún jiā le tiān jiā jì]
'Milk Is Not Pure, Pretending To Be Pure With Additives' expresses a sarcastic view toward the insincerity or dishonesty. The term 'additive' implies artificial efforts made to look genuine on the outside while inside, it may not be the same.