What is the poem "Qingshan asks me when you are free"

Cut to the chase and see the green hills are not old day by day. I asked Qingshan when I was old, and Qingshan asked me when I was free.

"I asked Qingshan when I was old, and Qingshan asked me when I was idle." be

I asked Qingshan, when will you wither and decline? Qingshan, in turn, asked me how many days I could enjoy the landscape at leisure.