How much is the taxi from Badaling to Ming Tomb? And how can I get transport back to Dongzhimen?

The taxi fare is estimated to be about CNY80~100. Well, it may be not easy to get a taxi from Badaling to Ming Tomb. From Ming Tomb back to Dongzhime, you can take special tourist bus 872 (formerly 925) from Dingling or Changling to Desheng Gate, then walk to Jishuitan Station to take subway line 2 and get off at Dongzhimen.