By bus, From Mutianyu to Tianamen Square? From Forbidden City to Beijing West Railway Station?

To Tiananmen Square: you can take bus no. H23 or H24 at Mutianyu Roundabout which is 5min walking distance to the main entrance of Mutianyu and get off at Huairou North Avenue. Then change to bus no. 916 to Dongzhimen. After that, take subway line 2 to Qianmen. Get out of exit C and walk to the square within 10min.

To West Railway Station: walk to Tiananmen West subway station and take line 1 to Military Museum, where you can change to line 9 to get there.