China's 100BN Himalayan Tofu Dregs Mega Dam

Regardless of the politics, the Himalayas are a very young mountain range, or tectonic uplift - and are highly unstable....

By age, I mean in geological time lines.

https://en.wikipedia.org/wiki/Himalayas

A Few Short Extracts:

The Himalayas, or Himalaya (/ˌhɪməˈleɪ.ə, hɪˈmɑːləjə/ HIM-ə-LAY-ə, hih-MAH-lə-yə)[b] is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has several peaks exceeding an elevation of 8,000 m (26,000 ft) including Mount Everest, the highest mountain on Earth. The mountain range runs for 2,400 km (1,500 mi) as an arc from west-northwest to east-southeast at the northern end of the Indian subcontinent.

The Himalayas occupy an area of 595,000 km2 (230,000 sq mi) across six countries–Afghanistan, Bhutan, China, India, Nepal, and Pakistan. The sovereignty of the range in the Kashmir region is disputed among India, Pakistan, and China. It is bordered by the Karakoram and Hindu Kush ranges on the northwest, Tibetan Plateau in the north, and by the Indo-Gangetic Plain in the south. Its western anchor Nanga Parbat lies south of the northernmost bend of the Indus river and its eastern anchor Namcha Barwa lies to the west of the great bend of the Yarlung Tsangpo River. The Himalayas consists of four parallel mountain ranges: the Sivalik Hills on the south; the Lower Himalayas; the Great Himalayas, which is the highest and central range; and the Tibetan Himalayas on the north. The range varies in width from 350 km (220 mi) in the north-west to 150 km (93 mi) in the south-east.

The Himalayan range is one of the youngest mountain ranges on Earth and is made up of uplifted sedimentary and metamorphic rocks. It was formed more than 10 mya due to the subduction of the Indian tectonic plate with the Eurasian Plate along the convergent boundary. Due to the continuous movement of the Indian plate, the Himalayas keep rising every year, making them geologically and seismically active. The mountains consist of large glaciers, which are remnants of the last ice age, and give rise to some of the world's major rivers such as the Indus, Ganges, and Tsangpo–Brahmaputra. Their combined drainage basin is home to nearly 600 million people including 52.8 million living in the vicinity of the Himalayas. The region is also home to many endorheic lakes.

Etc.

Quite extensive.