桦: The tree species, birch. "Birch" symbolizes the toughness akin to a tree, unyielding to wind and rain, metaphorically representing a robust physique conducive to good health.

坤: Qian and Kun, with Qian representing heaven and Kun symbolizing earth, embody the essence of all things in the universe. When used in personal names, they reflect an individual's lofty aspirations and dreams.