Workers celebrate the completion of the Gutangyuan No 3 tunnel of the second phase of Hangzhou-Wenzhou railway in East China's Zhejiang province, Dec 14, 2021. The first tunnel of the second phase of Hangzhou-Wenzhou railway was completed on Tuesday. The newly constructed 120-kilometer high-speed railway line, connecting Hangzhou and Yiwu with a designed speed of 350 kilometers per hour, is an important part in China's high-speed railway network. [Photo/WeChat account: crecshgh]

Workers celebrate the completion of the Gutangyuan No 3 tunnel of the second phase of Hangzhou-Wenzhou railway in East China's Zhejiang province, Dec 14, 2021. [Photo/WeChat account: crecshgh]

Photo taken on Dec 14, 2021 shows the Gutangyuan No 3 tunnel of the second phase of Hangzhou-Wenzhou railway in East China's Zhejiang province. [Photo/WeChat account: crecshgh]