Karakoram Highway between Pakistan and China was completed in _____

The construction of Karakoram Highway was started in 1959 and completed in 1979.
Karakoram Highway is also known as KKH or N-35 in Pakistan.
Karakoram Highway is also known as Friendship Highway in China.
The length of Karakoram Highway is 1300 Km or 810 miles
It starts from Hasan Abdal and ended on China Pakistan border.