When the person behind is heard by the person concerned, it's better to make a sharp turn of the conversation(bei hou shuo ren bei dang shi ren ting dao shi bu fang hua feng dou zhuan yi hua jie mu )

If you're "bad mouthing" someone else, you'll find the person standing behind you halfway through the conversation. At this time, don't panic. You can turn the topic around and say as if nothing happened However, these words are hearsay, not necessarily true. As far as I know, he is quite upright, and he is not such a person... " In this way, you will plant a thorn into a flower. If you don't turn your head and have a look, there will be a smile on your face.

Chinese PinYin : Bei Hou Shuo Ren Bei Dang Shi Ren Ting Dao Shi Bu Fang Hua Feng Dou Zhuan Yi Hua Jie Mu