A staff member conducts maintenance work at a high-speed train base in Nanjing, east China's Jiangsu Province, Jan. 28, 2026. Railway departments nationwide are actively conducting train maintenance to ensure safe operations during the upcoming 2026 Spring Festival travel rush. (Photo by Yang Suping/Xinhua)

Staff members conduct maintenance work at a high-speed train base in Kunming, southwest China's Yunnan Province, Jan. 29, 2026. Railway departments nationwide are actively conducting train maintenance to ensure safe operations during the upcoming 2026 Spring Festival travel rush. (Photo by Yang Zixuan/Xinhua)

A staff member conducts maintenance work at a high-speed train base in Nanjing, east China's Jiangsu Province, Jan. 27, 2026. Railway departments nationwide are actively conducting train maintenance to ensure safe operations during the upcoming 2026 Spring Festival travel rush. (Photo by Xin Yi/Xinhua)

A staff member conducts maintenance work at a high-speed train base in Nanjing, east China's Jiangsu Province, Jan. 27, 2026. Railway departments nationwide are actively conducting train maintenance to ensure safe operations during the upcoming 2026 Spring Festival travel rush. (Photo by Yang Suping/Xinhua)

Staff members conduct maintenance work at a high-speed train base in Kunming, southwest China's Yunnan Province, Jan. 29, 2026. Railway departments nationwide are actively conducting train maintenance to ensure safe operations during the upcoming 2026 Spring Festival travel rush. (Photo by Yang Zixuan/Xinhua)

A staff member conducts maintenance work at a high-speed train base in Nanjing, east China's Jiangsu Province, Jan. 27, 2026. Railway departments nationwide are actively conducting train maintenance to ensure safe operations during the upcoming 2026 Spring Festival travel rush. (Photo by Xin Yi/Xinhua)