Page not found (404)

Request Method: GET
Request URL: http://fudan-disc.com/data/PHEME_
Raised by: django.views.static.serve

"/PJ/Web/discsite/backend/backend/data/PHEME_" does not exist

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.