The No. 10 Subway Line connecting new city zones of Beijing opened for engineering trials on Thursday as part of the subway expansion for the Olympic Games and as relief for the city's congested roads.

The first phase of Line 10 connects new regions built in the past two decades in southeast and northwest Beijing.

The line's color scheme is black, white and gray and combines old and new in its design - including Chinese traditional elements, like traditional painting, and hi-tech style, like space-capsule shaped walls.

The orange-colored Huangzhuang Station is the line's most eye-catching station. "The station has a hi-tech flavor as it is in Zhongguancun, a hi-tech district of Beijing", designers said.