扪参历井

Explanation: ① Don Li Bai "Quiet Night" poem: "Well Li Yang palpable threat of interest rate reference to hand on themselves for sitting deep sigh." Argument, well, all the stars were, respectively, Shu Qin distinction. That way since the Qin Shu, steep mountains, you can touch the argument, well two stars. Later, because of "palpable reference calendar well" to describe the high and steep mountains, road obstacles. ② describe the world the difficulties ahead. 　　Source: Tang Li Bai, "Quiet Night" Poetry Yang palpable threat reference calendar information well to take a deep sigh Ying held onto. "Sung sickle" Princes forty-six words "thank Chengdu Tang Wen Bo knows the table goes 'well palpable argument calendar, dare to the difficulty of speech Shudao; to look at clouds, darker Chang'an away.' From the River by two after the official who Xie Table each other together with this one. " 　　Examples: Doo Young Kei mistakenly pour famous Floating Life ~ letter. ★ Qing Qian, "Yan City" Poetry II