know nothing at all
Nothing, Chinese idiom, Pinyin is y ī w ú Su ǒ w é n, which means that I haven't heard of it at all, and I don't know it at all. From to Zhang tingqian.
The idiom comes from Lu Xun's to Zhang tingqian: "but I don't know anything about it here. I think it's probably over."
know nothing at all
treasure a thing by wrapping it up carefully - shí xí yǐ cáng
the things are still there , but men are no more the same ones - wù shì rén fēi
referring to the great fright of routed soldiers - fēng shēng hè lì