Introduction to Xiao and Sword: In a glass display case, a flute and a sword are displayed. Like the plaque hanging directly above the main hall, "Sword Qi Xiao Xin" is the soul of Gong Zizhen's poems. The sword spirit is the spirit of a madman; the heart of the flute is the heart of resentment and suppression. This word is the most appropriate to describe him. He dares to worry and be angry, speak freely, dare to love and hate, and has extraordinary sorrow and joy.