你是我的大世界你是你的小宇宙
[nĭ shì wŏ de dà shì jiè nĭ shì nĭ de xiăo yŭ zhòu]
This name portrays two interlinked feelings: one person being a vast and important world for another ('my big world'), while the latter is their own small but perfect universe, symbolizing the profound impact of one on another.