A stewardess works on a test train of a high-speed railway line connecting Xi'an with Yan'an in northwest China's Shaanxi Province, Nov. 17, 2025. A high-speed railway line connecting Xi'an, the capital of northwest China's Shaanxi Province, with Yan'an in northern Shaanxi has entered its trial operation phase, marking a significant step toward full operation. (Photo by Jia Zhiwei/Xinhua)