The three capitals are ancient poems, and they are all patriotic poems that care about the country and the people and have the world at heart.

The first two pieces recommend the guqin piece "Guan Shan Yue", because the guqin is relatively low-pitched and soul-stirring, and can express the sadness and grief in the poem; the latter piece recommends the guzheng piece "General's Order", The guzheng is high-pitched and exciting, suitable for expressing the shouting meaning in the poem.