as firm as a rock
An ruotai mountain, Chinese idiom, Pinyin is "Anru à t à ISH à n", which means to describe extremely safe and stable, with "an ruotai mountain". From the southern history of Liang Ji Xia Lun.
The origin of Idioms
Liang Ji Xia Lun, the southern history of China, said, "if you call yourself an ruotai mountain, you can't do anything about it."
Analysis of Idioms
Antonym: an Rutai mountain
Idiom usage
Used as predicate, object, attribute; used in writing. example sleeping in my father-in-law's house at night, an ruotai mountain. The seventeen volume of Qi Dong Ye Yu by Zhou Mi of Song Dynasty
as firm as a rock
Long life does not hold one's post down - shòu bù yā zhí
expression of thanks for a host 's hospitality - zuì jiǔ bǎo dé