Want to ask how I take the transport from Tianjin airport to Beijing airport? Is easy for me? We have 9 persons.

At the airport, you can take the direct shuttle bus to reach Bawangfen Long-distance Bus Station in Beijing. Get out of the station, you can easily walk to Dawanglu Station to take Beijing subway line 1 to reach to Xidan. At Xidan, you can find direct buses to reach Beijing Capital Airport directly.