瓮中之鳖

wèng zhōng zhī biē

lit. like a turtle in a jar

to be trapped (idiom)

wèng

variant of 甕|瓮[weng4]

zhōng

(bound form) China; Chinese

zhī

(possessive particle, literary equivalent of 的[de5])

biē

variant of 鱉|鳖[bie1]