以卵击石

yǐ luǎn jī shí

lit. to strike a stone with egg (idiom); to attempt the impossible

to invite disaster by overreaching oneself

以

yǐ

abbr. for Israel 以色列[Yi3 se4 lie4]

卵

luǎn

egg; ovum; spawn

击

jī

to hit

石

shí

abbr. for Shijiazhuang 石家莊|石家庄[Shi2 jia1 zhuang1], the capital of Hebei