Core Viewpoint - The construction of the Beijing Subway Line 22 (Pinggu Line) has officially entered the track laying phase, marking a significant milestone for the project [1] Group 1: Project Development - The track laying work at the Hebei section of the Beijing Subway Line 22 has commenced, with two large-span gantry cranes successfully placing 25-meter standard track segments [1] - This development lays a solid foundation for the subsequent progress of the project [1] Group 2: Impact on Transportation - Once completed and operational, the new subway line is expected to effectively alleviate traffic pressure on cross-border roads [1] - The line will significantly enhance commuting efficiency for residents traveling between Beijing and Hebei [1]