The tunnels are part of a 24 kilometre realignment project which has been completed in collaboration with China in over three years.
The 'Pakistan-China Friendship Tunnels' are the network of seven-kilometre-long five tunnels which restored Karakorum Highway (KKH) near Attabad lake in Hunza valley of Gilgit- Baltistan region in the country's north.
The restoration of KKH is said to be linked with the historic USD 46 billion China-Pakistan Economic Corridor project.
The tunnels have been constructed by the National Highway Authority (NHA) in collaboration with the China Road and Bridge Corporation.