安如磐石

ān rú pán shí

as solid as rock (idiom); as sure as houses

安

ān

(bound form) calm; peaceful

如

rú

as

磐

pán

firm

石

shí

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