From Beijing South railway to Nanjing Great hotel Wang Fujing by subway and go to West Station

First I should say that the line 9 has not connected the Military Museum and the West Railway Station, so you have to get out of the subway station from Military Museum and follow the direction boards to find the place where you can take the bus to reach the train station.
From the South Railway Station, you need to get out of the station also from Wangfujing Station and then you can walk along the Wangfujing Street to find your hotel.