那年十七岁的夏天
[nèi nián shí qī suì de xià tiān]
Translated as 'That Summer When I Was Seventeen Years Old'. It refers back to formative teenagehood summers full events shaping who they became today—such as budding romances, close friendships made under sunlit skies brimming youth vigor, or bittersweet departures from childhood naivete.