Workers analyze measuring data at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 21, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
Workers prepare to conduct work at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 21, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
A worker strengthens the components of the track at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 21, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
A worker checks the track situation at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 21, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
A worker sets operation parameters at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 21, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
Workers drink hot water to fight against the cold at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 21, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
A worker conducts measuring work at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 21, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
A worker conducts measuring work at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 20, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
Workers check equipment before working at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 20, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
Workers carry testing equipment to be laid on tracks at Huajiashan tunnel in south China's Guangxi Zhuang Autonomous Region, Jan. 20, 2022.
The 6.984-km-long Huajiashan tunnel locates on the high-speed railway in south China's Guangxi Zhuang Autonomous Region. Railway workers provide millimeter-level services for passing trains to ensure their safe operation.
During the Spring Festival travel rush this year, the inspection team increased the inspection frequency to ensure passengers' travel safety. (Xinhua/Cao Yiming)
