Hi, I'm going to Zhoukoudian to see peking man museum.

There is no direct subway that can take you to the scenic spot. You need to transfer. Take subway line 2 to Xuanwumen Station and take subway line 4 to Caishikou Station. Then transfer to subway line 7 to BJ West Railway Station and take subway line 9 to Guogongzhuang Station.
After arriving, take subway Fangshan Line, and get off at Liang Xiang Xanadu Residential Area South Gate. Take public bus no. 38 (Fangshan) to Peking Man Site Station. Then walk to the destination directly.