Elder Zhuang was also concocting elixirs for Han Xiaoying. However, her skills weren't as high as Chu Feng's; she was concocting elixirs to suppress the Evil Qi.
This method of treatment is considered the last resort.
Just like during Ancient Times when the great floods were a disaster, Yu the Great's father labored for nine years, reinforcing and raising the riverbanks, building large dams. In the end, the floods only became more fierce.
Yu the Great, learning from his father's failed efforts at flood control, dredged the channels, directing the waters from plains and lakes into the riverways, all flowing into the sea. After thirteen years of such efforts, he finally succeeded.
At the moment, Han Xiaoying's bodily condition somewhat resembles the disastrous floods.