都是酸奶别装纯
[dōu shì suān năi bié zhuāng chún]
'All are yogurt, stop pretending to be pure'. The name humorously implies everything has a complex side (or hidden ingredients). The phrase conveys skepticism towards appearances, advising against being easily deceived by surface-level impressions of others, and hints to always see beyond their seemingly simple exteriors, which is an ironic tone.