我的世界最美好的有你在
[wŏ de shì jiè zuì mĕi hăo de yŏu nĭ zài]
'Wo De Shijie Zui Meihao De You Nin Zai' means 'In my world, you are what makes it wonderful.' It’s a heartfelt expression of affection, suggesting that this person’s happiness is closely tied to being with a particular individual.