If you are lucky to get here after a storm at sunset, you are going to enjoy the Best Beijing skyline.
No need to go up and no need to use the telephoto lens, just your phone can make awesome photos.
Chaoyang Park (Go inside from the north gate and walk a few minutes to get to the north side of the lake)
Subway: Dongfengqiaobei exit C, go inside from the east gate of Chaoyang Park 东风桥北C
Taxi: North Gate of Chaoyang Park 朝阳公园北门