She had not left, although she originally had intended to. She had hidden in the restroom until Zhou Jing had left, and then she had snuck into the woman's office. After rummaging through the desk for a long time, she had eventually found the bottle that Zhou Jing had looked at. She had carefully poured some of the powder onto a piece of tissue.
After leaving Zhou Jing's office, she had taken the powder to a friend of hers in medical school. Later that night, her friend had texted her what it was—arsenic.
So… Zhou Jing is planning to find an opportunity to poison Gu Yusheng at his wedding!
Having always wanted to be with Gu Yusheng, she had committed numerous unscrupulous acts toward Qin Zhi'ai, but she had never once thought about harming him.