Hi, how to get to qianmen street or wangfujing street from jingshan park?

To Qianmen street: you can take bus No.5 from Xibanqiao station to Meishijie station, and walk east of 500m. It takes around 30 minutes with CNY2.
To Wangfujing street: you can take bus No.103 from Forbidden city station to New Dong'an market station, and walk south of 300m to it. It takes around 30 minutes with CNY2 .

Thanks for the reply, Yammy.
Just want to make sure if I got this right, so if I want to go to Qianmen St, I have to get out from West Gate of Jingshan Park to Jingshan West St. and take bus no.5 from Xibanqiao station to Meishijie station. Is this correct?

Yes, that's right.