In the broad sense the Himalaya not only includs the Himalaya Mountains but also the Karakoram Range and the Hindu Kush mountains, located on the Pamir Plateau, the Gangdise which located in the middle and the east of the Tibetan Plateau, and the east Hengduan Mountains. People always take the Himalaya Mountains as Himalaya, in the general concept of China that is the continuous mountains---the Nanga Parbat on the Pamir Plateau to the Namjabarwa at the turning of the Yalutsangpo River. It's about 2500 kilometers long and 200-300 kilometers wide. The Karakoram Range and the Nianqing Tangkula Mountain and the Hengduan Mountauns also mean the mountains in its series as the Himalaya.
Meteorologists divide the Himalaya into four parts from the south to the north: the little Himalaya, the hills and mountains enjoys an elevation of 1000-1500 meters and has a warm climate and abundant rainfall and dense forests. The small Himalaya, which enjoys an elevation of 3000-4000 meters, it has a mild climate and revealed mountains as well as green mountains and clear waters. The big Himalaya, which is the backbone of the Himalaya Mountains, it enjoys an elevation of more than 6000 meters and also characterized by the snow-covered mountains and glaciers. The west Himalaya, part of the ancient old Mediterranean Sea-Tethys, it enjoys an elevation of about 4000-5000meters. The public also divide it into east part, middle part and west part simply. It is also divided by the regions.
Study the map of Asia or have a bird's view of south Asia and middle Asia, you will find the Himalaya looks like a platinum necklace of Asia. The Nanjiabawa and the Nanga Parbat looks like a beautiful bow. The Qomolangma looks like a diamond. Himalaya is the source of the culture and also the birthplace of some religions, such as Buddhism and Hinduism. Maybe sometimes mankind and the nature share the same rules.