![Qianjiang cross-river tunnel under construction](../../../images/attachement/jpg/site1/20110420/0023ae9e15670f1889eb14.jpg)
Construction site of the Qianjiang cross-river tunnel is seen in Hangzhou, east China's Zhejiang Province, April 18, 2011.The under-construction 4.45-kilometer-long tunnel under the Qiantang River is adopted by the outside diameter of 15.43 meters shield technology, six-lane twin-tube, as the world's largest diameter of one of sheild tunnel. (Xinhua/Xu Yu)
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