This photo taken on Feb. 25, 2025 shows the construction site of Jintang undersea tunnel of Ningbo-Zhoushan Railway in Ningbo, east China's Zhejiang Province. The 16.18-km Jintang undersea tunnel under construction connects the Jintang islet of Zhoushan and the coastal area of Ningbo in Zhejiang Province and is an important facility for a high-speed railway line connecting cities of Ningbo and Zhoushan in the province. (Xinhua/Huang Zongzhi)