Please can you advise how to go to baigou from beijing capital airport.

You need to take airport express to Sanyuanqiao Station and transfer to subway line 10 to Dahongmen Station, Exit C2.
Then walk north along Nanyuan Road around 0.6 miles (1 km) to find Muxiyuan Bus Station. There are several coaches that can take you to Baigou directly. They depart from 06:10 to 18:30. The ticket fare is CNY 40 per person.