我们背对背数星星我们手牵手看月亮
[wŏ men bèi duì bèi shù xīng xīng wŏ men shŏu qiān shŏu kàn yuè liàng]
It portrays two scenarios of a romantic relationship: when the couple faces hardships (represented by 'back to back counting stars', suggesting distance but still longing for each other), or when they are together (described as 'holding hands watching the moon' which signifies closeness and romance).