Get off at the subway 10 line "suzhoujie station", in the southeast of the station, not far from the station. Ask anyone.
You can also get off at "Haidian Huang Zhuang Station" on Metro Line 4, and go west along Haidian South Road to the North Gate of the First Normal University. This one is a little farther, about a bus stop.
It is recommended to check Baidu map, which is very clear.
Have a nice trip!