The construction of key connecting lines for the Chengdu-Chongqing Zhongxian High-Speed Railway and the Chengdu-Dawan High-Speed Railway has achieved a significant breakthrough. The completion of two crucial connecting tunnels, Songjiawan Downhill Tunnel and Pujiaogou Uphill Tunnel, at Lezhi Station in Sichuan marks a critical step forward. This development will enhance railway transportation efficiency in the southwestern region and promote deeper integration of the Chengdu-Chongqing economic circle with the national high-speed rail network. AI
RANK_REASON This is a significant infrastructure development in China's high-speed rail network. [lever_c_demoted from significant: ic=1 ai=0.1]
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