Literature Reference: 四面杉萝合，空堂画老仙。—— 《玉芝观王道士》 Surrounded by cedars and vines, an empty hall houses a painting of an ancient immortal. Source from 'Yuzhi Guan Wang Daoshi'.
空: The heavens, the expanse.
堂: The main hall, the distinguished guest. In names, it often refers to someone handsome and dashing.
Meaning: An empty hall signifies tranquility and a realm beyond worldly concerns.