shì zi tiāo ruǎn de niē
lit. it's the soft persimmons that people choose to squeeze (idiom)
fig. it's the weak (i.e. 軟柿子|软柿子[ruan3 shi4 zi5]) who get picked on; bullies pick soft targets
柿
shì
old variant of 柿[shi4]
子
zi
noun suffix, as in 椅子[yi3 zi5] "chair"
挑
tiāo
to carry on a shoulder pole
软
ruǎn
variant of 軟|软[ruan3]
的
de
of; ~'s (possessive particle)
捏
niē
variant of 捏[nie1]