Are these buses reliable, run in the early AM? Trying to get from Capital Normal University in Beijing to the airport to catch an international flight.

Hello again: I have looked closer at hours of operation above. Can you advise best stop from Capital Normal U to Airport so that I can understand if bus is viable? Also curious about reliability. Many thanks!

If you are referring to the campus at Xisanhuan North Road in Haidian District, it is suggested to take a taxi to Gongzhufen and transfer to shuttle bus line 4 to the airport directly. But I just checked the official website of the airport and the first bus of shuttle line 4 leaves around 04:30. Though, time is still not enough to catch your flight at 06:45. Therefore, I'm afraid you have to take a taxi to get to the airport in the early morning, unless you stay there for a night before.