Thank you for noticing this, it's I kept intentionally in my edit. 

I didn't add access=* to ways (e.g. w1122863215) that didn't have data before because I'm not sure about them. 

The reason for changing private to destination is that most universities in China only allow their teachers and students passage in their schools, whether it is pedestrians or vehicles.
If it is out of common practice, do you think all the roads in the entire campus should be changed to destinations?