Explanation:

Himalayas

Nathu La is a mountain pass in the Himalayas in East Sikkim district. It connects the Indian state of Sikkim with China's Tibet Autonomous Region. The pass, at 4,310 m above mean sea level, forms a part of an offshoot of the ancient Tea Horse Road. Nathu means "listening ears" and La means "pass" in Tibetan.On the Indian side, the pass is 54 km east of Gangtok, the capital of Sikkim. Nathu La is one of the three open trading border posts 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.