According to Baidu map, No.9 Road is 4.2km from Zhangjiakou Exhibition Hall to Jindingyi, and it takes 35 minutes by bus No.9. The specific route is as follows:

1. First walk 90 meters from Zhangjiakou Exhibition Hall to Exhibition Hall Station.

2. Secondly, take bus No.9 from Exhibition Hall Station, pass 8 stops, and get off at Xiyuan Community (Jinding Green Tree Inn) Station.

3. Finally, walk 460m to Jinding.