有你阳光更灿烂有你黑夜不孤单
[yŏu nĭ yáng guāng gèng càn làn yŏu nĭ hēi yè bù gū dān]
This phrase suggests that the other person brightens one's life and provides comfort even in difficult times; literally translates as 'with you the sunshine becomes brighter and with you the nights are not lonely'.