Literature Reference: 梓，梓木也；含，包含也。—— 《说文解字》 Zi refers to the catalpa tree; Han means to contain or embrace. Source from 'Shuowen Jiezi'.
梓: The tree name, known as the Catalpa.
含: Implication, encompassing.
Meaning: Zi symbolizes resilience and vitality of the catalpa tree; Han represents inclusiveness and depth, embodying profound meaning.