Happy and sad
The Chinese idiom, Pinyin, is l è w ǎ ng ā IL á I, which means joy is gone and sorrow is coming. It comes from Si Xuan Fu by Zhang Heng of Han Dynasty.
Idiom explanation
Joy goes, sorrow comes.
The origin of Idioms
Zhang Heng of Han Dynasty wrote in his "Si Xuan Fu" that "only Pan Yi has no anger, and he is afraid of music and comes to grief."
Happy and sad
pass on the ancient culture without adding anything new to it - shù ér bù zuò
beat the swords into ploughshares - zhù jiàn wéi lí
Advocating emotion and thinking - chàng qíng yě sī