抱着西瓜啃夏天抱着夏天啃西瓜
[bào zhe xī guā kĕn xià tiān bào zhe xià tiān kĕn xī guā]
Translating roughly to 'Holding a watermelon and munching through summer, holding summer and munching through a watermelon,' it uses playful imagery to express enjoyment of life’s simple pleasures.