好的评论：Yongsheng was a veryyyyyy easy professor. If you want an easy A, this is the class to take. There was no textbook, but the material is on power point slides. The class is interesting but he doesn't take attendance. He gives a lot of opportunities for extra credit. The only downside is that his english is very poor (but still understandable).
差的评论：Please spare yourself the trouble and do not take this class. It hurt my ears to hear him talk because he can barely speak English. There is no textbook and the slides he gives do not provide the info and questions on the test. Attendance is mandatory if you want to pass since that's the only way to get the informaiton to pass the tests and quizes
