Jiugong Tunnel

The Jiugong Tunnel or Siwei Tunnel  is a tunnel in Lieyu Township, Kinmen County, Fujian Province, Republic of China.

Geology
The tunnel is located on a coastal area at the southeast of Lieyu Island. It is located in a reef of granite mountain.

Architecture
The tunnel was constructed in a twin T-shape with four exits. It spans over a length of 790 meters and a height of 11.5 meters.