The Xiamen Xiang'an Tunnel(Chinese:翔安隧道) is the first subsea tunnel in mainland China. It connects Xiamen Island with Xiang'an District, reducing travel time by road from 90 minutes to nine minutes.This large-scale project is a dual three-lane road tunnel with a total length of 5.9km, including a 4.2km sea-crossing section. The deepest point is 70m below sea level. The triple-tube tunnel has two vehicular tunnels with a cross-sectional area of 122m2 each, and one smaller diameter service tunnel. A drill and blast method was adopted for tunnel construction.