Workers continue construction at an undersea tunnel as part of the Hong Kong-Zhuhai-Macao Bridge, July 5, 2017. The main structure of world's longest cross-sea bridge linking Hong Kong, Zhuhai, and Macao was finished on Friday, bridge builders said. The main structure measures 29.6 kilometers, consisting of a 22.9-km bridge section and 6.7-km underground tunnel. The bridge's total length is 55 kilometers. (Photo: China News Service/Chen Jimin)
