How far is the terminus (Qinghuadongluxikou) from campus by foot? Is there a google map location?

It is about 850 yards walking distance from the subway station to Southeast Gate of the campus.
You should get out off the Exit C and walk straight to Shuangqing Road. Walk southwards along the road for 650 yards, you will see the campus.
Google map can also help to work out the direction. You can have a try.

Thanks, so that works out to 777 meters...walkable, but not as close as I was hoping. Is there bus service from the subway station to campus?

Well, from the metro station, you can take bus no. 466 at South Gate of Shuangqing Raod Intersection, get off at East Qinghua Road West Gate Bus Stop. Then walk west around 440 yards.
By the way, there is no bus that can take you to the main gate of the campus directly. You need to walk. :)