Photo taken on Feb. 25, 2021 shows the Tseung Kwan O bridge under construction in south China's Hong Kong. A prefabricated double-arch steel bridge for the Cross Bay Link, Tseung Kwan O, was erected on the bridge piers on Friday in Hong Kong using the "float-over method." Upon completion, it will be the longest span and heaviest steel arch bridge in Hong Kong and another landmark cross-sea structure. (Xinhua/Li Gang)