By bus, take Line 4 to Xizhimen, transfer to Line 2, and take 1 station to Jishuitan. After exit A, go straight (east) for more than 500 meters, take bus No.877 (original 9 19 express) to the north side of Deshengmen Tower, and stop directly at Badaling. Instead of 9 19, take Badaling auxiliary road, which may take less than three hours. .