The Himalayas, the most majestic and highest mountain range in the world, lie principally in China. Also the longest mountain range in China, they stretch fro 2,400 kilometers from west to east and 200-300 kilometers from north to south in China's Tibet, Pakistan, India, Nepal, Sikkim and Bhutan.hina's mountain ranges run in different directions across the length and breadth of the country, giving shape to the general topography of China.