特仑苏也不一定纯
[tè lún sū yĕ bù yī dìng chún]
Here, 特仑苏 (TeLunSu) is the brand name for a popular dairy product known as high-quality pure milk in China. The phrase translates into 'Even Telsun isn't guaranteed to be pure.' On a literal level, it expresses skepticism about advertised purity or authenticity, extending this metaphorically toward questioning the honesty or genuineness of various promises or reputations.