Pei Lijun started to be wary of Xia Xin.
To prevent Xia Xin from doing something inappropriate at the wrong time.
If Gu Haoyan rejected Xia Xin's love letter, the game would be ruined. It was impossible to confuse the artificial intelligence.
Although Pei Lijun couldn't prevent Xia Xin from writing a love letter, she felt that she could prevent Xia Xin from sending it out.
After all, except for the time when Xia Xin came home from school, she couldn't keep an eye on her. For the rest of the time, she had to pay attention to Xia Xin's movements. They went to school together and were in the same class. If Xia Xin did something unusual, she would know.