陪伴才是最长久的告白谢谢你陪我长乐未央
[péi bàn cái shì zuì zhăng jiŭ de gào bái xiè xiè nĭ péi wŏ zhăng lè wèi yāng]
Longest confession is actually expressed by companionship rather than words. Thanks for staying beside me so I can live joyfully forever. It stresses the importance of being there for someone, rather than making promises verbally, as a sign of love commitment.