居心何在

What's (he) up to? / What's the motive behind all this?

surname Ju

(archaic) sentence-final particle expressing a doubting attitude

to reside / to be (in a certain position) / to store up / to be at a standstill / residence / house / restaurant / classifier for bedrooms

to harbor (evil) intentions / to be bent on / a tranquil heart or mind

heart / mind / intention / center / core / CL:顆|颗[ke1],個|个[ge4]

surname He

what / how / why / which / carry

where? / what place?

to exist; to be alive / (of sb or sth) to be (located) at / (used before a verb to indicate an action in progress)