Literature Reference: 九天阊阖开宫殿，万国衣冠拜冕旒。——《和贾至舍人早朝大明宫》 The heavenly gates open wide to the palace, as envoys from all nations bow before the imperial throne. Source from 'He Jia Zhi She Ren Zao Chao Da Ming Gong' by Wang Wei.
阊: The Gate of Heavenly Peace
阖:
Meaning: Cháng Hé symbolizes the celestial gate, representing sacredness, solemnity, and supreme authority.