There is no need to communicate between Wang Qingyuan and Li Changbi. Although the two are also classified as heterogeneous by their classmates, the gap between different dimensions is actually no shorter than the distance between different dimensions and the earth.
So they don't make small talk or worry about the other person's perception, but just throw out the words directly, without any modification... Only those who are interested in taking up the topic take a preparatory posture and get to the end of the conversation. Instead, just let the words fall freely without even an echo. Anyway, those two people are very accustomed to silence.