act on impulse
The Chinese idiom is ch à NGX à NGW à NGW é I. It means acting out of character.
Yang Yinyu once published a strange theory that "school is like family". That is to say, the school is like a feudal family. The headmaster is the parent and has the right to act recklessly. (Lu Xun's in memory of Liu Hezhen)
act on impulse
One hundred is not many, one is not few - bǎi bù wéi duō,yī bù wéi shǎo
even a drop of water couldn 't leak out - shuǐ xiè bù tōng
look after the masses as if they were injured -- love the people - shì rén rú shāng