Tunnel along Xining-Chengdu railway completed (1/6)

The Xining-Chengdu railway is under construction in southwest China's Sichuan Province, March 17, 2025. (Photo: China News Service/Liu Zhongjun)

The Banyou No.1 Tunnel, part of the Sichuan section of Xining-Chengdu railway, was drilled through on Monday. The railway is an integral part of China's "eight vertical and eight horizontal" high-speed rail network, with most sections at an altitude of about 3,500 meters.

The Xining-Chengdu railway is under construction in southwest China's Sichuan Province, March 17, 2025. (Photo: China News Service/Liu Zhongjun)

The Xining-Chengdu railway is under construction in southwest China's Sichuan Province, March 17, 2025. (Photo: China News Service/Liu Zhongjun)

The Xining-Chengdu railway is under construction in southwest China's Sichuan Province, March 17, 2025. (Photo: China News Service/Liu Zhongjun)

The Xining-Chengdu railway is under construction in southwest China's Sichuan Province, March 17, 2025. (Photo: China News Service/Liu Zhongjun)

Constructers work in the Banyou No.1 Tunnel along the Xining-Chengdu railway in southwest China's Sichuan Province, March 17, 2025. (Photo: China News Service/Liu Zhongjun)