A drone photo taken on Dec. 16, 2025 shows a constructor working on a power transmission line in east China's Anhui Province. The main-body construction of the 500-kV power transmission line from Xiangjian to Ludao in Anhui Province was successfully completed on Wednesday. With a total length of 136.8 kilometers, the line will further optimize the power grid structure of Anhui and enhance power supply reliability upon completion. (Xinhua/Zhou Mu)

A drone photo taken on Dec. 16, 2025 shows constructors working on a power transmission line in east China's Anhui Province. The main-body construction of the 500-kV power transmission line from Xiangjian to Ludao in Anhui Province was successfully completed on Wednesday. With a total length of 136.8 kilometers, the line will further optimize the power grid structure of Anhui and enhance power supply reliability upon completion. (Xinhua/Zhou Mu)

A drone photo taken on Dec. 16, 2025 shows constructors working on a power transmission line in east China's Anhui Province. The main-body construction of the 500-kV power transmission line from Xiangjian to Ludao in Anhui Province was successfully completed on Wednesday. With a total length of 136.8 kilometers, the line will further optimize the power grid structure of Anhui and enhance power supply reliability upon completion. (Photo by Zheng Xianlie/Xinhua)

A drone photo taken on Dec. 16, 2025 shows a constructor working on a power transmission line in east China's Anhui Province. The main-body construction of the 500-kV power transmission line from Xiangjian to Ludao in Anhui Province was successfully completed on Wednesday. With a total length of 136.8 kilometers, the line will further optimize the power grid structure of Anhui and enhance power supply reliability upon completion. (Xinhua/Zhou Mu)

A drone photo taken on Dec. 17, 2025 shows constructors working on a power transmission line in east China's Anhui Province. The main-body construction of the 500-kV power transmission line from Xiangjian to Ludao in Anhui Province was successfully completed on Wednesday. With a total length of 136.8 kilometers, the line will further optimize the power grid structure of Anhui and enhance power supply reliability upon completion. (Photo by Zheng Xianlie/Xinhua)

A drone photo taken on Dec. 16, 2025 shows constructors working on a power transmission line in east China's Anhui Province. The main-body construction of the 500-kV power transmission line from Xiangjian to Ludao in Anhui Province was successfully completed on Wednesday. With a total length of 136.8 kilometers, the line will further optimize the power grid structure of Anhui and enhance power supply reliability upon completion. (Photo by Zheng Xianlie/Xinhua)

A drone photo taken on Dec. 17, 2025 shows constructors working on a power transmission line in east China's Anhui Province. The main-body construction of the 500-kV power transmission line from Xiangjian to Ludao in Anhui Province was successfully completed on Wednesday. With a total length of 136.8 kilometers, the line will further optimize the power grid structure of Anhui and enhance power supply reliability upon completion. (Photo by Zhao Xianfu/Xinhua)