Christoffer Nyman had to make a substitution after 25 minutes.
In came Darrell Kamdem Tibell.
Overall, it was an uneventful first half, but then with barely an hour played, Yukiya Sugita pulled in the lead goal on a nice half volley.
They then kept out of Norrköping and thus the Uppsala team now passes their opponents.
Sirius is tenth in the Allsvenskan while "Beijing" has gone down to an eleventh place.