Does the Beijing Airport Express Line to Dongzhimen runs 24 hours?

Greetings,

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Is the Airport Express Line to Dongzhimen runs 24 hours, or does it close between 11 PM - 5 AM? Does shuttle bus Line 2 runs 24 hours as well (Xidan Terminal)? What would be a recommended way to get to Jishuitan Station area at night (2 AM)? Thank You!