Staff members of the Wangkun Line maintenance workshop in Golmud section under China Railway Qinghai-Xizang Group Co., Ltd. maintain the rail along the Qinghai-Xizang Railway in northwest China's Qinghai Province, Feb. 6, 2026. Deep in the Kunlun Mountains, railway workshop mechanics have intensified patrol at key places along the railway lines, safeguarding the smooth operation of the railway during the Spring Festival travel rush. (Xinhua/Qi Zhiyue)

Staff members of the Wangkun Line maintenance workshop in Golmud section under China Railway Qinghai-Xizang Group Co., Ltd. maintain the rail along the Qinghai-Xizang Railway in northwest China's Qinghai Province, Feb. 6, 2026. Deep in the Kunlun Mountains, railway workshop mechanics have intensified patrol at key places along the railway lines, safeguarding the smooth operation of the railway during the Spring Festival travel rush. (Xinhua/Zhang Long)

Staff members of the Wangkun Line maintenance workshop in Golmud section under China Railway Qinghai-Xizang Group Co., Ltd. maintain the rail along the Qinghai-Xizang Railway in northwest China's Qinghai Province, Feb. 6, 2026. Deep in the Kunlun Mountains, railway workshop mechanics have intensified patrol at key places along the railway lines, safeguarding the smooth operation of the railway during the Spring Festival travel rush. (Xinhua/Qi Zhiyue)

Staff members of the Wangkun Line maintenance workshop in Golmud section under China Railway Qinghai-Xizang Group Co., Ltd. maintain the rail along the Qinghai-Xizang Railway in northwest China's Qinghai Province, Feb. 6, 2026. Deep in the Kunlun Mountains, railway workshop mechanics have intensified patrol at key places along the railway lines, safeguarding the smooth operation of the railway during the Spring Festival travel rush. (Xinhua/Qi Zhiyue)

Staff members of the Wangkun Line maintenance workshop in Golmud section under China Railway Qinghai-Xizang Group Co., Ltd. maintain the rail along the Qinghai-Xizang Railway in northwest China's Qinghai Province, Feb. 6, 2026. Deep in the Kunlun Mountains, railway workshop mechanics have intensified patrol at key places along the railway lines, safeguarding the smooth operation of the railway during the Spring Festival travel rush. (Xinhua/Qi Zhiyue)

An aerial drone photo taken on Feb. 6, 2026 shows staff members of the Wangkun Line maintenance workshop in Golmud section under China Railway Qinghai-Xizang Group Co., Ltd. maintaining the rail along the Qinghai-Xizang Railway in northwest China's Qinghai Province. Deep in the Kunlun Mountains, railway workshop mechanics have intensified patrol at key places along the railway lines, safeguarding the smooth operation of the railway during the Spring Festival travel rush. (Xinhua/Qi Zhiyue)

An aerial drone photo taken on Feb. 6, 2026 shows staff members of the Wangkun Line maintenance workshop in Golmud section under China Railway Qinghai-Xizang Group Co., Ltd. maintaining the rail along the Qinghai-Xizang Railway in northwest China's Qinghai Province. Deep in the Kunlun Mountains, railway workshop mechanics have intensified patrol at key places along the railway lines, safeguarding the smooth operation of the railway during the Spring Festival travel rush. (Xinhua/Qi Zhiyue)

A staff member of the Wangkun Line maintenance workshop in Golmud section under China Railway Qinghai-Xizang Group Co., Ltd. maintains the rail along the Qinghai-Xizang Railway in northwest China's Qinghai Province, Feb. 6, 2026. Deep in the Kunlun Mountains, railway workshop mechanics have intensified patrol at key places along the railway lines, safeguarding the smooth operation of the railway during the Spring Festival travel rush. (Xinhua/Qi Zhiyue)