[shàng hé xià mù]   

上    和    下    睦    指长幼之间或上下级之间相处得很好。

指长幼之间或上下级之间相处得很好。

Those who are above and those who are below are all on good terms

上天入地    上树拔梯    上下其手    上智下愚    上下同门