何必/何苦 ‘hébì/hékǔ’ (there is no need/why bother, quite unnecessarily): The adverbs occur in rhetorical questions, they express the meaning that the situation described by the sentence is judged to be ‘unnecessary’:
Tā yǐjing shuō le tā bù qù, nǐ hébì yào zài wèn tā ne
(He already said that he wouldn’t go, why do you bother asking him again?)
 Loar, J. K. (2011). Chinese syntactic grammar: functional and conceptual principles. New York: Peter Lang.