Good things are interrupted

"Ouch!" "Plop!"
Zhu Qingmei suddenly felt her legs go weak and her body lost balance. She fell to the ground. She tried to stand up but failed. The effect of the drug was about to take effect.
"Sister Mei! Ah..." Zi Lan saw Zhu Qingmei suddenly fall to the ground. She screamed and was about to rush over to help Zhu Qingmei up. Suddenly, she felt a knife hit her neck. Her eyes went dark, and she felt dizzy. Then she lost consciousness.
"hey-hey…"
The knife attack was naturally from...