evidence: Pakistan borders Afghanistan at the Durand Line, which runs from the Hindu Kush and the Pamir Mountains. A narrow strip of Afghanistan territory called the Wakhan Corridor extends between Pakistan and Tajikistan. From the eastern tip of the Wakhan Corridor starts the Sino-Pak border between the People's Republic of China and Pakistan spanning about 510 km. Iran has a province named Sistan via Baluchistan that borders Pakistan. Baluchis are an ethnic majority in this area. In 1957 Pakistan signed a frontier agreement with Iran according to which the border was officially declared and the two countries haven't had this border as a subject of serious dispute at all.