Thousand-Year-Old People with the Same Bones

I have traveled through thousands of years, But not to change history. The late Qin Dynasty, the Han Dynasty, the prosperous Tang Dynasty, the residual Song Dynasty... I live like the humblest ant of every generation. The old marks on the collarbone are the marks of reincarnation. The old friends around me are reunions after a thousand years. Until one day I finally understood: I am not a passerby, I am a returnee. This long reincarnation, Just to completely reconcile with all the selves who don't end well.