黃土不露天 [ㄏㄨㄤˊ ㄊㄨˇ ㄅㄨˋ ㄌㄨˋ ㄊㄧㄢ; huang2 tu3 bu4 lu4 tian1] a slogan used in reference to a project to improve greenery in some parts of Northern China ◄ ►