Literature Reference: 何地早芳菲？宛在长门殿。—— 《鼓吹曲辞 芳树》 Where does the early fragrance bloom? As if in the Changmen Palace. Source from 'Gu Chu Qu Ci Fang Shu'.
长: Strengths, merits.
门: Method, knack.
Meaning: Changmen Palace, a Han Dynasty palace, often symbolizes deep-seated melancholy and noble solitude.