What is the best and easiest eay to go to Badaling Great Wall?

First, take the Metro Line 5 at Dongdan Station and then get off at Lishuiqiao Station where you need to transfer to take Metro Line 13. Then walk out of the subway from G4 at Huoying Station. After about one km, take the Suburban Railway S2. Finally, get off at Badaling. This is the most suitable route for you.