Construction started for Dashanwei Tunnel of the Longlong High-speed Railway. First 3 hole high speed railway tunnel in Guangdong.

It is managed by Xiamen-Shenzhen Railway Guangdong Co., Ltd. and constructed by China Railway 25th Bureau.

Tunnel has 4 lines in 3 openings. 1276 meter tube one has 2 lines.

https://m.chinanews.com/wap/detail/cht/zw/10414759.shtml