小道消息

wǒ tīng xiǎo dào xiāo xi shuō nǐ jiù yào lí kāi

我听小道消息说你就要离开。

I heard on the grapevine that you're leaving.

guān yú mǒu rén de xiǎo dào xiāo xi

关于某人的小道消息。

grapevine about somebody