extremely hard
The Chinese idiom pinyin is n á NY ú sh à ngTi à n, which means it is more difficult than heaven. It's extremely difficult to describe, not easy to achieve. From Shangshu Jianwu Wang.
The origin of Idioms
"If you want to do what you want to do, you will be in danger. It's hard for heaven," said Meicheng of Han Dynasty
Idiom usage
It is very difficult to refer to
Idiom story
The difficulty of Shu Road is hard to reach the sky: Zhuge Liang once fought for the state of Wei through Shu Road. Li Bai cherishes the memory of the ancients and remembers that the war was bad and the people were in dire straits. The author brings up the old story again. On the surface, he laments the inconvenient transportation of Shu Road, but in fact, it implies a kind of thinking about the society.
extremely hard
an orphan-calf injures the nursing cow -- ingratitude - gū dú chù rǔ
neither riches nor honours can corrupt him - fù guì bù yín