[shàng xià yī xīn]   

上    下    一    心    上上下下一条心。 褒义>

意思是上上下下一条心。作谓语、定语；指思想一致。

Both the higher and lower levels are united as one

上好下甚    上陵下替    上层建筑    上慢下暴    上兵伐谋