房山区
Shidu () is a town in Fangshan District in far southwestern Beijing, around from the border with Hebei. Shidu, literally the "Tenth Crossing", is located in the valley of the meandering Juma River and so named because accessing the town is said to require crossing the river ten times. Shidu is known for the surrounding karst landscape, the largest in northern China, that is created by the Juma River cutting through the Taihang Mountain. The elevation of Shidu varies from above the sea level. , it had 21 villages under its administration.