Literature Reference: 魂兮归来！去君之恒干，何为四方些？ —— 《楚辞·招魂》 Soul, return! Why leave your eternal foundation and wander in the four directions? Source from 'Chu Ci·Zhao Hun'.
恒: Eternity, unwavering perseverance.
干:
Meaning: Heng Gan signifies an eternal foundation, symbolizing steadfast roots and unwavering faith.