Construction of China's second undersea tunnel has kicked off yesterday in Qingdao City, east China's Shandong Province.
The Jiaozhou Bay Tunnel, linking the city's Tuandao in d owntown to Huangdao District, is expected to be completed in three to four years.

    The tunnel, stretching about 7,800 meters, is expected to cost 3.18 billion yuan. The Xiang'an tunnel in Xiamen City, Fujian Province, which is under construction, is the country's first undersea tunnel.