as immutable as the rivers
As a Chinese idiom, the Pinyin is Ji ā NGH é x í NGD ì, which means that rivers flow on land forever. It means that things are obvious, unquestionable and irrefutable. It comes from "no matter in the rain in biefeng nunnery of Jiaoshan, send a letter to my shedi Mo".
The origin of Idioms
Zheng Xie of the Qing Dynasty wrote "no matter in the rain in Jiaoshan biefeng nunnery, send a letter to shedi Mo": "how can it be that the sun and the moon run through the sky and the rivers run across the land?"
Idiom usage
It is often used in conjunction with "the sun, the moon and the sky". Examples those who think that morality is the rule of the day, the rule of the moon, and the rule of the river, have never increased or decreased since the beginning. On public morality by Liang Qichao in Qing Dynasty
as immutable as the rivers
give rewards for good service and punishments for faults - shǎng láo fá zuì
an old man enjoys life with no cares - hán yí nòng sūn