他三宫六院我在冷宫
[tā sān gōng liù yuàn wŏ zài lĕng gōng]
The term '三宫六院' (san gong liu yuan) historically refers to a royal harem of concubines in ancient Chinese emperors’ times. In contrast, the speaker feels left out or undervalued, symbolically placing themselves in the '冷宫' (cold palace) which is a term used for a neglected and abandoned place.