Beijing will open three new underground lines this month.

The first phase of Line 10, the Olympic Extension and the Airport Express Line are currently being tested without passengers.

Beijing Municipal transport officials say the No.10 line is 24 kilometers long, with 22 stops. Almost half are inter-exchanges. The Olympic branch line is 5.91 kilometers' long, and has 4 stops. It's also part of of the No.8 line.

The Airport express track is 28 kilometers long. Passengers will be able to transfer from Dongzhimen Station between Loop Line 2 and the Capital Airport Track. It's expected to ease the increasing traffic congestion on the roads between the airport and downtown areas.

(CCTV July 15, 2008)