那些年少念而不得那些年少得而不惜
[nèi xiē nián shăo niàn ér bù dé nèi xiē nián shăo dé ér bù xī]
This deep title can translate as 'The Youthful Years We Longed For And Could Not Get; And Those Gotten Without Precious Effort'. It reflects nostalgia mixed with regret over youthful pursuits and missed opportunities in life and relationships.