I have known Joseph in-depth for more than ten years. That is, when Chien-Chih (Joseph) studied in NKUST, I was the supervisor of his graduation project, and he also participated in two courses which I taught. Also, because Joseph was the team leader of his graduation project, I always discussed the progress of his graduation project with him. Moreover, I keep contacting him when he graduated, and I ever invited him to serve as the industry lecturer for Mobile Apps Developments.