be as firm as a huge rock
An Ru Pan Shi, a Chinese idiom, Pinyin is "NR ú P á NSH í", which means to be as secure as a rock. The description is very solid and unshakable. It comes from Xunzi, the rich country.
Analysis of Idioms
[synonym] an Rushan, firm as a rock, stable as Mount Tai
The origin of Idioms
Xunzi · Fuguo: "if you are not famous, if you are not profitable, if you are not angry, then you will be safe on the rock and live on the wings of the flag."
Idiom usage
Subject predicate type; as predicate, adverbial; with commendatory meaning, the description is very stable and unshakable. example the authority of his company is rock solid. the royal family of the constitutional state, therefore, all the Tao are in the same. Interpretation of responsible cabinet by Liang Qichao in Qing Dynasty
be as firm as a huge rock
When the sun is in the middle of the day, the moon is full - rì zhōng zé zè,yuè mǎn zé kuī