from dongzhimen subway to Beijing south railway station, metro line 2 turns to Daxing line 4. By querying Baidu map, the specific route is as follows: from Dongzhimen, take the inner ring of Metro Line 2, in the direction of Jishuitan Station, arrive at Xuanwumen Station, then transfer to Daxing Line of Metro Line 4, in the direction of Tiangongyuan Station, and arrive at Beijing South Railway Station. The journey takes about 31 minutes, and the fare is 5 yuan.