Hello there, @weihong ...
I am reviewing older questions here in the Canvas Community, and I came across your question. I noticed that your question has been sitting out here unanswered since September 5, 2019. It seems as though you may have stumped Community members with your question. Have you been able to find any solutions on your own since you first posted your question five months ago? If so, would you be willing to post a note below? Or, are you still looking for some help from Community members? In reviewing your question, the link you posted to your course is behind a secure login page for your school, so none of us in the Community would be able to see the page you were referencing. I'm assuming that you are referring to the "Attendance" page (one of the buttons on your left-hand side course navigation) of your course? If so, the "Attendance" page is only visible to instructors...not students. There are also several Guides on how the "Attendance" tool works.
For the time being, I am going to mark your question as "Assumed Answered"...not because we've been able to necessarily help find a solution, but because we've not heard back from you and because there hasn't been any new activity in this topic for over five months. However, that won't prevent you or others from posting additional questions and/or comments below that are related to this topic. I hop e that's okay with you, Weihong. Looking forward to hearing back from you soon.
