Where to go to ride the bus from Tianjin to Beijing Capital Airport?

From your hotel, you are advised to take a taxi to get to Tianhuan Bus Station first. The cab fare is about CNY 25 in the day time. Then you can find several direct shuttle bus that can take you to the Capital Airport. The bus schedules are from 04:30 to 18:30. It takes around 2.5 hours on the way. And the ticket fare is CNY 82 per person.