Under the blue sky is floating a winding gossamer - like jade ribbon , which is a thoroughfare out of jia yu pass chanted by poeft for ages ; wich is the silk road leads from changan in the han dynasty to ancient rome 蓝天之下,游丝般飘着一条宛延的玉带,那就是被诗人千古吟诵的阳关古道那便是从汉长安直达古罗马的丝绸之路。