Partridge day Zhang why Su Causeway also frowned?

Zhang euphemistically saved his homesickness by playing the flute upstairs, misty mountains and rivers, flying a thousand miles, and pear blossoms in the rain. Tomb-Sweeping Day's sacrifice was unable to attend because he was far away from home and wandering in a different place, which aggravated his depression and kept him awake at night. He also recalled the farewell scene of his relative Su Causeway, adding to his homesickness.