how to get world park from dengshikou in Beijing by subway?

If taking the subway, you need to transfer several times. If it is ok to you, here is the transfer route.
Take the subway line 5 from Dengshikou to Ciqikou, and then transfer to line 7 to BJ West Railway Station, where you can transfer to line 9 to Guogongzhuang Station. At last, transfer to Fangshan Line to Dabaotai Station. Then walk about 130 yards, you will reach the park.