如果阳光永远都炽热如果彩虹不会掉颜色
[rú guŏ yáng guāng yŏng yuăn dōu chì rè rú guŏ căi hóng bù huì diào yán sè]
A poetic way to express a wish for things (here warmth from sunlight, beauty like the rainbow) never to change, suggesting longing for eternal good moments and happiness, free of sadness and fading away.