On December 18th, with a loud noise, the Jianshanpo Tunnel of the CN-5 Standard Branch of the South Sichuan Intercity Railway, which was built by Sichuan Luqiao Company, was successfully penetrated. The Jianshanpo Tunnel belongs to the control project of the self-squatting section of the Sichuan-South Intercity Railway. Its smooth penetration marks the staged victory of the construction of the key control projects of the whole line. The tunnel with the longest and most difficult construction of the Sichuan-South Intercity Railway is officially completed.