expression · wine-lover's heart is not in the cup; focusing on something other than the activity at hand (originally referring to enjoying the scenery rather than the wine)

他虽然坐在酒席上，但醉翁之意不在酒，而是在欣赏窗外的月色。

expression · having a hidden agenda; having other things in mind; with an ax to grind; accomplishing something besides what one ostensibly set out to do

他表面上是来关心我的近况，其实醉翁之意不在酒，是想通过我认识我的老板。