「虛籟」含義到底為何?: “「虛」是「空虛」、「虛無」的意思,「籟」原是古代的一種簫,因為簫的聲音是從孔穴裡發出來的,又引申為從孔穴裡發出聲音,後來人們把籟泛指為聲音,「虛籟」是指沒有聲音,或是空虛的聲音。” (Xū means empty and Lài is a classical instrument that is now generalized to mean "sound." Xū Lài therefore means "no sound" or "the sound of emptiness".)