The course videos (in a total of 24 hours) posted in this section are only used for the purpose of the class teaching at Jiangsu University, which will be mainly served for students to conveniently review each course hour in each time taught by a lecturer or practiced by students own. These videos are lawfully protected by our own proprietary intellectual property right. It should be approved, ahead of time in a writing, by Dr./Prof. Jianzhong Sun for any other purpose uses with these videos beyond the course study at Jiangsu University. Otherwise, Accountability will be applied to those improper uses of the course videos.