Be careful
Chinese words, Pinyin is ninq ī ngdu ō庸 ng, which means to take the light and heavy, refers to a lot of work to do. It comes from Liu Hong's maidservant.
The origin of Idioms
In Yuan Dynasty, the second fold of Liu Hong's maidservant married by Wu Mingshi: "how can I make him light and heavy, but I can sweep the bed and fold the quilt."
Idiom usage
It refers to the complicated work.
Be careful
Be generous in correcting mistakes - gǎi guò bù lìn