How can u go from beijing south railway station to Jingtailong international hotel by subway or bus

From the south railway station, there is no direct buses to reach your hotel.
In my opinion, you can take a taxi to reach your hotel directly and the taxi fare is around 20 to 30RMB.
If you want to take subway, you can take the subway line 4 to reach Caishikou Station and then you still need to take a taxi to reach your hotel.