how far universal studios from city inn hotel happy valley, beijing ? how to get there ?

The distance between these two places is about 42 miles.
From your hotel, you can take subway line 7, and get off at Guangqumennei Station first. Then take public bus no.836 (Zhangfang inter-zone bus) to North Fangshan Nanguan Overpass Station. After arriving, walk southeast around 240 yards.