Kuwo Music Network. Due to copyright reasons, the pure music of "Strong Years", the opening theme of the TV series "Snow Leopard", is only available on KuWo Music.com. Pure music is music whose original intention of composing does not include lyrics. This music mode expresses the author's emotions completely with pure and beautiful music, so it is generally called pure music. It has no lyrics, but it can embody the wonderful artistic conception with its own beautiful melody.