Haidian District is a district of the municipality of Beijing. It is mostly situated in northwestern Beijing, but also to a lesser extent in the west, where it has borders with Xicheng District and Fengtai District.
It is 431 square km in area, making it the second-largest district in urban Beijing area, and is home to 3,133,469 inhabitants as of November 2020.
Wikipedia https://en.wikipedia.org/wiki/Haidian_District
Coordinates 39°57'29.058" N 116°17'32.658" E