1. Take subway line 4 from Beijing South Railway Station, pass 7 stops and arrive at Ping 'anli Station.
2. Walk about 10 meter and arrive at Li Pingan Road North Station.
3. Take bus No.83, pass 9 stops and arrive at the bus stop of National Gymnasium.
4. Walk about 240 meters to the fencing hall of the National Convention Center.
I don't know if you are talking about this Baidu map.