At 16,000 feet above sea level, the Khunjerab Pass is the highest-paved international border crossing in the world and the highest point on the Karakoram Highway. The roadway across the pass was completed in 1982, and has superseded the unpaved Mintaka and Kilik Passes as the primary passage across the Karakoram Range. At the same time, the Karakoram Highway or KKH connecting the two countries is adjacent to the Wakan Corridor and China's only official border crossing into Afghanistan. Numerous cases of heroin and precursor trafficking have been reported over recent years on the KKH between Tashkugan and Kashgar in China and Sust in Pakistan, and as the China Pakistan Economic Corridor initiative is projected to expand cross-border trade between the two countries illicit trade and trafficking of different kinds is also expected to increase and likely diversify. The choice of Khunjerab Pass for Karakoram Highway was decided in 1966: China citing the fact that Mintaka would be more susceptible to air strikes recommended the steeper Khunjerab Pass instead.