ㄏㄜˊㄑㄧㄥqīngㄏㄞˇhǎiㄧㄢˋyàn

  1. 黃河清澈大海平靜沒有風浪比喻太平盛世孤本雜劇·孟母·第一》:當時風調雨順國泰民安河清海晏偃武修文。」海晏河清」。風平浪靜

the Yellow River is clear and the sea is calm, the world is at peace (idiom)​