According to the tips, if you take Line 2, how can you reach Zhongguancun?
Transfer to Line 1 at Jianguomen station, and then transfer to Line 10 at Guomao station.
Transfer to Line 5 at Chongwenmen station, and then transfer to Line 10 at Guomao station.
Transfer to Line 13 at Dongzhimen station, and then transfer to Line 8 at Beituchengstation.
Transfer to Line 1 at Dongzhimen station, and then transfer to Line 10 at Guomao station.