On 20 August, it was a hive of activity at the construction site of ‘the longest span in the world’ Zhang-Jing-Gao Yangtze River Bridge. Up to 21 August, more than half of the diaphragm wall trench of north anchorage of south channel bridge of Zhang-Jing-Gao Yangtze River Bridge contracted by China Railway Major Bridge Engineering Group had been completed. Photo by Ding Chuanbin