A vehicle moves on the highway of the tunnel under Donghu Lake in Wuhan, capital of Central China’s Hubei province, Dec 28, 2015. The Donghu Lake tunnel, China’s longest tunnel under a lake, was open to traffic on Dec 28. A car could run through the 10.6-kilometer-long tunnel in around 15 minutes.[Photo/Xinhua]

A vehicle moves on the highway of the tunnel under Donghu Lake in Wuhan, capital of Central China’s Hubei province, Dec 28, 2015. The Donghu Lake tunnel, China’s longest tunnel under a lake, was open to traffic on Dec 28. A car could run through the 10.6-kilometer-long tunnel in around 15 minutes.[Photo/Xinhua]

A vehicle moves on the highway of the tunnel under Donghu Lake in Wuhan, capital of Central China’s Hubei province, Dec 28, 2015. The Donghu Lake tunnel, China’s longest tunnel under a lake, was open to traffic on Dec 28. A car could run through the 10.6-kilometer-long tunnel in around 15 minutes.[Photo/Xinhua]

A vehicle moves on the highway of the tunnel under Donghu Lake in Wuhan, capital of Central China’s Hubei province, Dec 28, 2015. The Donghu Lake tunnel, China’s longest tunnel under a lake, was open to traffic on Dec 28. A car could run through the 10.6-kilometer-long tunnel in around 15 minutes.[Photo/Xinhua]

A vehicle moves on the highway of the tunnel under Donghu Lake in Wuhan, capital of Central China’s Hubei province, Dec 28, 2015. The Donghu Lake tunnel, China’s longest tunnel under a lake, was open to traffic on Dec 28. A car could run through the 10.6-kilometer-long tunnel in around 15 minutes.[Photo/Xinhua]