我在他的身后找你的影子
[wŏ zài tā de shēn hòu zhăo nĭ de yĭng zi]
Wo Zai Ta De Shenhou Zhao Nide Yingzi roughly translates to Looking for Your Shadow Behind Him. The owner perhaps yearns after a relationship or a presence they've left behind or someone resembling an ex-lover/love interest who's still influential in their mind