Engineers of the First Company of the China Construction Third Engineering Bureau supervise a worksite over a digital project platform in Nanjing, east China's Jiangsu Province, Nov. 17, 2020. Constructors of the Jinling Zhonghuan construction project have recently adopted a "smart worksite" application system that integrates computing technologies and the Internet of Things to ensure worksite safety, and to enhance managerial efficiency. The system comprises a digital project platform, a face recognition system, a personal location system, and an environmental monitoring system. (Xinhua/Li Bo)