你是我的回忆我是你的过去
[nĭ shì wŏ de huí yì wŏ shì nĭ de guò qù]
Suggesting an entwined history where one person holds memories of another in their heart ('you are my memories'), and acknowledges they were once part of each other's lives ('I am your past'). Expresses intertwined histories and changing perspectives on a shared past.