Zhongling Tunnel of Chongqing-Xiamen high-speed railway drilled through

A drone photo taken on Sept. 1, 2024 shows the construction site of the Zhongling Tunnel on the Chongqing-Xiamen high-speed railway in southwest China's Chongqing. The Zhongling Tunnel, part of the Chongqing East-Qianjiang section of the Chongqing-Xiamen high-speed railway, has been drilled through on Sunday, which means all the 50 tunnels on the section have been drilled through and all the 82 main structures of the bridges have been connected. (Xinhua/Tang Yi)

Workers build at the construction site of the Zhongling Tunnel on the Chongqing-Xiamen high-speed railway in southwest China's Chongqing, Sept. 1, 2024. The Zhongling Tunnel, part of the Chongqing East-Qianjiang section of the Chongqing-Xiamen high-speed railway, has been drilled through on Sunday, which means all the 50 tunnels on the section have been drilled through and all the 82 main structures of the bridges have been connected. (Xinhua/Tang Yi)

Workers build at the construction site of the Zhongling Tunnel on the Chongqing-Xiamen high-speed railway in southwest China's Chongqing, Sept. 1, 2024. The Zhongling Tunnel, part of the Chongqing East-Qianjiang section of the Chongqing-Xiamen high-speed railway, has been drilled through on Sunday, which means all the 50 tunnels on the section have been drilled through and all the 82 main structures of the bridges have been connected. (Xinhua/Tang Yi)

A worker builds at the construction site of the Zhongling Tunnel on the Chongqing-Xiamen high-speed railway in southwest China's Chongqing, Sept. 1, 2024. The Zhongling Tunnel, part of the Chongqing East-Qianjiang section of the Chongqing-Xiamen high-speed railway, has been drilled through on Sunday, which means all the 50 tunnels on the section have been drilled through and all the 82 main structures of the bridges have been connected. (Xinhua/Tang Yi)

Workers build at the construction site of the Zhongling Tunnel on the Chongqing-Xiamen high-speed railway in southwest China's Chongqing, Sept. 1, 2024. The Zhongling Tunnel, part of the Chongqing East-Qianjiang section of the Chongqing-Xiamen high-speed railway, has been drilled through on Sunday, which means all the 50 tunnels on the section have been drilled through and all the 82 main structures of the bridges have been connected. (Xinhua/Tang Yi)