天空那么蓝我却那么孤单
[tiān kōng nèi me lán wŏ què nèi me gū dān]
'The sky is so blue, yet I am so lonely.' Blue sky represents beauty and tranquility in the environment. But against this peaceful backdrop, the loneliness stands out even more sharply, suggesting a contrast between inner feelings (loneliness) and the beautiful external world.