An aerial drone photo taken on Sept. 26, 2025 shows workers carrying out ballast filling operations on the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Photo by Qu Yiwei/Xinhua)

An aerial drone photo taken on Sept. 27, 2025 shows a freight train travelling along the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

An aerial drone photo taken on Sept. 27, 2025 shows China-Europe freight trains waiting for transloading operations at the Suifenhe Station in Suifenhe, northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

An aerial drone photo taken on Sept. 27, 2025 shows a freight train travelling along the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

An aerial drone photo taken on Sept. 26, 2025 shows workers carrying out track gauge measurement operations on the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Photo by Qu Yiwei/Xinhua)

An aerial drone photo taken on Sept. 27, 2025 shows China-Europe freight trains waiting for transloading operations at the Suifenhe Station in Suifenhe, northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

An aerial drone photo taken on Sept. 27, 2025 shows a freight train travelling along the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Photo by Qu Yiwei/Xinhua)

An aerial drone photo taken on Sept. 27, 2025 shows a gantry crane carrying out transloading operations on a returning China-Europe freight train at the Suifenhe Station in Suifenhe, northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

An aerial drone photo taken on Sept. 27, 2025 shows a gantry crane carrying out transloading operations on a returning China-Europe freight train at the Suifenhe Station in Suifenhe, northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

A gantry crane carries out transloading operations on a returning China-Europe freight train at the Suifenhe Station in Suifenhe, northeast China's Heilongjiang Province, Sept. 27, 2025. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

An aerial drone photo taken on Sept. 26, 2025 shows workers performing tightening operations on the rail fasteners of the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Photo by Qu Yiwei/Xinhua)

A gantry crane carries out transloading operations on a returning China-Europe freight train at the Suifenhe Station in Suifenhe, northeast China's Heilongjiang Province, Sept. 27, 2025. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

An aerial drone photo taken on Sept. 27, 2025 shows a freight train travelling along the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

Workers connect rail tracks on the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province, Sept. 26, 2025. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Photo by Qu Yiwei/Xinhua)

An aerial drone photo taken on Sept. 27, 2025 shows a freight train travelling along the newly upgraded section of a railway linking Suifenhe and the China-Russia border in northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)

An aerial drone photo taken on Sept. 27, 2025 shows a gantry crane carrying out transloading operations on a returning China-Europe freight train at the Suifenhe Station in Suifenhe, northeast China's Heilongjiang Province. A major upgrade of a railway linking Suifenhe and the China-Russia border was completed on Saturday, with new tracks put into operation that allow trains to run at speeds up to 120 km/h, more than double the previous limit of 55 km/h, significantly enhancing transport capacity. (Xinhua/Wang Song)