It's an open secret that Jiu Lanshu doesn't like Cone Sheng Ling.
Zhui Shengling has never given Jiu Lanshu a good look.
Vampires and hunters have a distinctly hostile relationship.
So Zhui Sheng poisoned Jiu Lanshu without any hesitation (fog)
Jiulan Shu replied with various lower limits (dense fog)
The two of them go back and forth in a simple and rough manner, for fear that the other person will live too well.
But I don't know when I got used to the other person's existence.