The pass, at 4,310 m (14,140 ft) above mean sea level, forms a part of an offshoot of the ancient Silk Road. Nathu means "listening ears" and La means "pass" in Tibetan. On the Indian side, the pass is 54 km (34 mi) east of Gangtok, the capital of Sikkim. Only citizens of India can visit the pass, and then only after obtaining a permit in Gangtok. Nathu La is one of the three open trading border p
osts between China and India; the others are Shipkila in Himachal Pradesh and Lipulekh (or Lipulech) at the trisection point of Uttarakhand–India, Nepal and China. Sealed by India after the 1962 Sino-Indian War, Nathu La was re-opened in 2006 following numerous bilateral trade agreements. The opening of the pass shortens the travel distance to important Hindu and Buddhist pilgrimage sites in the region and was expected to bolster the economy of the region by playing a key role in the growing Sino-Indian trade. However, trade is limited to specific types of goods and to specific days of the week. It is also one of the four officially agreed BPM (Border Personnel Meeting) points between the Indian Army and People's Liberation Army of China for regular consultations and interactions between the two armies, which helps in defusing stand-offs. The four BPM are: Chushul in Ladakh, Nathu La in Sikkim, Bum La Pass in Tawang district of Arunachal Pradesh, and Lipulekh Pass in Uttarakhand, 35 kilometres (22 mi) from the Chinese town of Burang.
