wèng zhōng zhuō biē
lit. to catch a turtle in a jar (idiom)
fig. to go after easy prey
瓮
wèng
variant of 甕|瓮[weng4]
中
zhōng
(bound form) China; Chinese
捉
zhuō
to clutch
鳖
biē
variant of 鱉|鳖[bie1]