If a student from the Tianju Hall got bullied outside, he would go and find the person who bullied his student to teach them a lesson.
According to him, he could torture his students in the Tianju Hall because after all, he did it for their own good so that they would have a good future. However, he would never let his students get bullied outside of the Tianju Hall. Therefore, Gu Xijiu believed that he would not kill two of his students just to expel her from the school.
Was it Yun Qingluo? The two students possessed good martial arts and were relatively strong as a team. Yun Qingluo might not have the ability to kill both of them together.
Based on what the coroner said, the two men were killed from the front. It was impossible for Yun Qingluo to do so because she was not capable of doing so yet.
So who was the culprit? Who was the one who had so much hatred for her and wanted her to be dead? This trap was clearly set for her, but she could not think of anyone who would do so.