From Qingdao University to Qingdao 2 1, you need to walk 560 meters to Xinjiazhuang Community Station, take bus No.309 and get off at Central Hospital Station (22 stops), and walk 290 meters to 2 1.
If you want to reverse, I suggest you take the No.226 bus, 1 10, and then take the No.309 bus.