在于

to be in / to lie in / to consist in / to depend on / to rest with

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

to go / to take / sentence-final interrogative particle / variant of 於|于[yu2]

(of time or place) in; at; on / (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for / (indicating a source) from; out of / (used in comparison) than / (used in the passive voice) by