joyous but not indecent
Chinese idiom, Pinyin is l è é RB ù y í n, which means to be happy but not excessive. It means to express emotion with restraint. From the Analects of Confucius, Bayi.
The origin of Idioms
In the Analects of Confucius in the pre Qin period, "Guan Ju is happy but not lewd, sad but not sad.".
Idiom usage
The expression of emotion is restrained. Examples: anger but not violence, resentment but not anger, sadness but not sorrow, pleasure but not lewdness, although poetry, but also a lesson. ---The second chapter of Lu Xun's outline of the history of Chinese Literature
joyous but not indecent
the more one tries to hide , the more one is exposed - yù gài ér zhāng
one 's face lit up with happiness - xǐ xiào yán kāi
folly of trying to see the sky with a basin over one 's head - dài pén wàng tiān