You can take bus No.2 at Dongmen Station to Ximandou, and then take bus No.5 or 10 to get off at Experimental Primary School.
Xianyou county library is opposite the experimental primary school. Go ahead 50 meters and see the sign of "Xianyou County Library" or "Zhengjue Temple". Go to the alley and walk about 10 meters. Good luck. I used to work near there. Have I been there?