Literature Reference: The window brightens with the dawn of stars, while the warmth of the lamp lingers. Source from 'He Qian Yuanyuan Jinzhong Xing Jian Shi'.
北: Direction, in the morning facing the sun, the side to the left hand, opposite to "south".
窗: The device for ventilating and airing a house.
Meaning: The northern window symbolizes tranquility and wisdom, often associated with the reclusive life of scholars.