深爱之人藏心不挂嘴久念之人在梦不在眼
[shēn ài zhī rén zàng xīn bù guà zuĭ jiŭ niàn zhī rén zài mèng bù zài yăn]
This complex phrase '深爱之人藏心不挂嘴久念之人在梦不在眼' roughly translates as 'a loved one deeply hidden in heart rather than on lips; the long-missed person shows up in dreams but not in reality.' This implies that this user cherishes memories of someone they once cared about very much, possibly implying a past love.