Railway staff wait for the departure inside the high-speed test train in southwest China's Chongqing Municipality, May 9, 2025. With the departure of the high-speed test train from Chongqing East Railway Station, the joint debugging and test of Chongqing section of the newly-built Chongqing-Xiamen high-speed railway were successfully completed and started its test operation on Friday. (Xinhua/Tang Yi)

The high-speed test train departs from Chongqing East Railway Station in southwest China's Chongqing Municipality, May 9, 2025. With the departure of the high-speed test train from Chongqing East Railway Station, the joint debugging and test of Chongqing section of the newly-built Chongqing-Xiamen high-speed railway were successfully completed and started its test operation on Friday. (Xinhua/Tang Yi)

Railway staff wait for the departure inside the high-speed test train in southwest China's Chongqing Municipality, May 9, 2025. With the departure of the high-speed test train from Chongqing East Railway Station, the joint debugging and test of Chongqing section of the newly-built Chongqing-Xiamen high-speed railway were successfully completed and started its test operation on Friday. (Xinhua/Tang Yi)

An aerial drone photo shows the high-speed test train departing from Chongqing East Railway Station in southwest China's Chongqing Municipality, May 9, 2025. With the departure of the high-speed test train from Chongqing East Railway Station, the joint debugging and test of Chongqing section of the newly-built Chongqing-Xiamen high-speed railway were successfully completed and started its test operation on Friday. (Xinhua/Tang Yi)

The high-speed test train parks at Chongqing East Railway Station waiting for the departure in southwest China's Chongqing Municipality, May 9, 2025. With the departure of the high-speed test train from Chongqing East Railway Station, the joint debugging and test of Chongqing section of the newly-built Chongqing-Xiamen high-speed railway were successfully completed and started its test operation on Friday. (Xinhua/Tang Yi)

Railway staff prepare to board the high-speed test train in southwest China's Chongqing Municipality, May 9, 2025. With the departure of the high-speed test train from Chongqing East Railway Station, the joint debugging and test of Chongqing section of the newly-built Chongqing-Xiamen high-speed railway were successfully completed and started its test operation on Friday. (Xinhua/Tang Yi)

The high-speed test train parks at Chongqing East Railway Station waiting for the departure in southwest China's Chongqing Municipality, May 9, 2025. With the departure of the high-speed test train from Chongqing East Railway Station, the joint debugging and test of Chongqing section of the newly-built Chongqing-Xiamen high-speed railway were successfully completed and started its test operation on Friday. (Xinhua/Tang Yi)