Every single time Zhao Youyue emerges from the Two Dimensional Gate, which of course, is after a long session of taking possession of another person and carefully leading that person's life, she tends to take some time off to relax and get a good rest.
However, in some instances where she has played the troublemaker and has purposefully caused some havoc, there was no need for any rest. A wicked fantasy of that level is somewhat relaxing in itself.
Whenever Zhao Youyue takes the literary world more seriously, the world instantly turns into her reality. This time, when she shifted as Chu Luoxun, why did she make such a display of a suffering, pitiful figure? Well, it was to make Leng Zi feel the extent of her pain, so that she would be able to depict Chu Luoxun's sickly condition more accurately and genuinely, and secure the sympathy of the readers.