HANGZHOU - Workers in East China's Hangzhou city on Thursday completed digging a tunnel that runs under a high-speed railway and that will soon hold a subway line.

The 800-meter-long tunnel, which connects Wengmei Station and Yuhang High-speed Railway Station along the city's No 1 Subway Line, was dug under the Shanghai-Hangzhou High-speed Railway, making the subway line the first in China to run under an operating high-speed railway, said Huang Xianfeng, chief of the design department of the city's subway group.

The first subway line in Hangzhou, capital of Zhejiang province, the 48-km-long No 1 also runs under the Qiantang River and the Beijing-Hangzhou Grand Canal, added Huang.

Construction of the line started in March 2007, and it is expected to be put into trial operation in June.