唐人刘皂有一首题为《渡桑干》的诗:“客舍并州已十霜,归心日夜忆咸阳。无端更渡桑干水,却望并州是故乡。”诗人离开家乡咸阳,十年旅居井州,思乡之情强烈到了极点,每天都在想着回去。皇帝老爷于是跟他开个玩笑——你不是嫌并州离你老家咸阳远么,那好,我再给你来个狠的——“无端更渡桑干水”:把你发配到离家乡更远的 Tang soap Liu has a title entitled “Sang Sang dry” poem: “Guest house and the state has ten frost, mind day and night memories of Xianyang. Undoubtedly more Sang dry water, but hope and state is the hometown. ” The poet left his hometown of Xianyang, ten Living in Jingzhou years, homesickness strongly to the extreme, every day thinking about going back. Emperor then joked with him - you are not too suspicious and the state far away from your hometown of Xianyang, Well, I’ll give you a ruthless - Farther home