我爱你简简单单你爱我幸幸福福
[wŏ ài nĭ jiăn jiăn dān dān nĭ ài wŏ xìng xìng fú fú]
It means 'I love you simply and plainly while you love me happily and contentedly.' It describes an ideal relationship where both individuals appreciate each other's pure love leading to a happy life together.