How to get to world park beijing from china international exhibition center via subway or bus route?

Subway is a good way to go, but it requires many transfers. Here is the direction:
take line 15 from the China International Exhibition Center metro station to Wangjing and transfer to line 14 and get off at Jiulongshan, where change to ine 7. You need to get off at West Railway Station. Take line 9 there and transfer to Fangshan Line at Guogongzhuang. Disembark at Dabaotai. Its exits A and B are very close to the entrance of the park.