流年之后的旧友人暮年之后的新情人
[liú nián zhī hòu de jiù yŏu rén mù nián zhī hòu de xīn qíng rén]
'A old friend after time passes, and a new lover in my twilight years.' This implies a change in the relationship dynamic over the passage of time, transforming from friendship to romantic involvement later in life.