Relations between Afghanistan and Pakistan are peaceful and formally correct. The unsettled relations between Pakistan and India, however, interfere with the Afghan foreign trade which for decades had gone mostly by the Khyber Pass. Another reason for the not too favourable balance of trade is the falling price of karakul lambskins, the most valuable of the country's exports. Three new motor roads are under construction in 1948: Kabul to Mazar, Kabul to Khyber Pass, and the Badakhshan road from Kabul toward Sinkiang province, China.