不是特仑苏就不要装纯牛奶
[bù shì tè lún sū jiù bù yào zhuāng chún niú năi]
The phrase literally says 'Don’t pretend to be pure milk if you are not Tetragen (a well-known premium dairy brand).' It implies one shouldn’t fake authenticity or quality, and encourages people to be honest about who they are.