How can I get to Beidaihe from Beijing Capital Airport?

It is suggested to go to Qinhuangdao firstly. You can take shuttle bus at Gate 1 of T3 Departure Hall and Gate 15 on the F1 of T2. It costs CNY140 with 4 hours and departs from 10:00, 13:00, 15:00, 18:00, 20:00. Then take bus No.34 from Qinhuangdao Railway Station to Beidaihe District Government Station, and walk north of 300m to your destination. It costs CNY2 with 1.5 hours.

please, tell me from which Beijing railway station is it more convenient to get to Beidaihe?

There are more trains departing from the main Railway Station.