西瓜西瓜夏天走了你也走吧
[xī guā xī guā xià tiān zŏu le nĭ yĕ zŏu ba]
Watermelon, watermelon, summer is gone, and so are you. This uses watermelons, often associated with summer, metaphorically. It suggests farewell in the context of summer ending, signifying the departure or disappearance of something cherished once the season of happiness fades.