as difficult as to climb up to the sky
Chinese idiom, Pinyin is n á NR ú D ē ngTi ā n, meaning to describe difficult things.
Idiom usage as predicate and attribute; used in figurative sentences. It's hard to ask the miser to raise money.
as difficult as to climb up to the sky
the wrangling guest robs the place of the host - xuān bīn duó zhǔ
decision making through operations research - yùn chóu jiàn cè
reward according to sb . 's deserts - bān gōng xíng shǎng