One of Comments:
It was very easy to see that Xiaoyu was interested in the subject matter. Xiaoyu would provide examples of how the information taught in class could be applied in the real world (would provide videos/articles of research going on that pertained to the course) and he would connect the information to his own projects that he had worked on. Xiaoyu was also very open to helping students during TA hours and had also made clear he was available to help through email if that would work better for students.