oh,my godness,at first sight of this slogan posted on the wall,i was astonished and amazed from the deep bottom of my heart.
furthermore,the slogan is really the best and most appropritely used in that place,it bears all the features of the people who are going in that place.the slogan is actually a kind reminding ,it goes as 来也匆匆,去也冲冲,i guess that some of you have already have the answer.the slogan is innovative,and as a matter of fact,it first appeared in the famous,widely-known---anhui normal university in wuhu city.
think about it,man.under what situation,you will enter a place9(m,ore precisely a public place) in a hurry,and then after doing what they have to do in it,they are required by the moral criteria to clean it band throw off it.
the answer is the well-known WC.are you smart enough to work the puzzle out ahead of me?