The opening of the Nathu La pass was the latest in a string of measures India and China have taken in recent years to improve ties and end decades of mutual suspicion rooted in a 1962 border war.
The 4,300 meter-high (14,000-foot) mountain pass, once part of the famed Silk Road, lies between India's northeastern state of Sikkim and China's Tibet region.
Sikkim's chief minister, Pawan Kumar Chamling, and the Chinese-appointed leader of Tibet Champa Phuntsok cut the ribbon opening the pass to the cheers of the gathered dignitaries, soldiers and traders from both sides, the AP reports.
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