How to transfer from T3 to T2 at Beijing airport?

The distance between Terminal 2 and Terminal 3 at the Beijing airport is around 8 kilometers. You can take the airport free shuttle bus from T3 to T2. The regular schedule is one shuttle bus every 15 minutes between three terminals T1, T2 and T3. It will take around 20 minutes for the shuttle bus from T3 to reach T2 at Beijing airport.