What does Lu Xun mean by quoting Tao Qian's elegy? What feelings do you have for the author?

Lu Xun quoted four lines from Tao Qian's elegy: "Relatives or sadness, others have sung, where to go when they die, the same mountain" to further express the meaning that "even if time flies and turns crimson, there is always a kind old shadow with a smile in the sadness of the desert", so as to expand the scope of his grief and indignation. It means that people should not forget, remember this blood debt and pay it back. This is the theme of Lu Xun's article "In Memory of Liu Hezhen Jun"; It would be sad if only relatives can remember.