The group’s name, castle in the air, stems from the classical Chinese phrase gongsan myeongwol, which describes a bright moon shining alone on a mountain devoid of human presence. Generally, the term gongsang (lit. daydreaming) is used with a negative connotation, alluding to a vague envisioning of unrealistic and unattainable things without any hope of being realized. Nevertheless, this often serves as a wellspring of creativity for many talented artists. Instead of portraying an empty, desolate mountain, castle in the air presents a mountain brimming with tales nurtured by their imagined fantasies, and shares their stories with everyone.
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