保工期、守边境，致敬奋斗者！坚守岗位度春节 为了更多人的美好生活

Group 1: Infrastructure Development - The Chongqing Caiyuanba Yangtze River Railway Tunnel is a critical component of the national "eight vertical and eight horizontal" high-speed railway network, with only the section from Chongqing Station to Chongqing East Station yet to be completed [1] - The tunnel project is a single-hole double-track tunnel, measuring 11,942 meters in length, utilizing both mining and shield tunneling methods for construction [5] Group 2: Workforce Commitment - During the Spring Festival, construction workers, including team leader Zhang Xuefei, chose to remain on-site to ensure the timely completion of the tunnel, reflecting their dedication to benefiting local communities [3][5] - The project has seen significant progress, with the shield section already completed and only 46 meters remaining in the mining section [5] Group 3: Border Security - Border police, such as Zhang Feng from the Tajik Autonomous County, also remained on duty during the Spring Festival, highlighting their commitment to national security in challenging conditions [7] - The patrol team faced difficulties due to melting snow and high-altitude conditions, which required them to take breaks to cope with low oxygen levels [9][14]