Literature Reference: 朝过宜春口，极北缺隄障。—— 《岳阳楼别窦司直》 Passing Yichun in the morning, the extreme north lacks a dike barrier. Source from 'Bie Dou Si Zhi'.
极: Positive, North Pole. Originally referring to the main beam of a house, it later extended to mean the pinnacle, the highest point, and other similar connotations.
北: Direction, in the morning facing the sun, the side to the left hand, opposite to "south".
Meaning: Extreme north signifies the farthest point, symbolizing the spirit of exploring the unknown and moving forward courageously.