It is named after its opening, in which King
汤 of Shang questions a minister about the edges of heaven and earth. It also tells of
伯牙 and
钟子期, the friends behind
高山流水, of the singer
秦青 whose voice 'stopped the drifting clouds', and of the two boys in
两小儿辩日 'Two Children Argue about the Sun', a school text.
