Observational studies of the Glacier Material Balance Project No. 1 at the Urumqi River Source in Tianshan, China began in the summer of 1959. At that time, the area of No. 1 glacier was 1.95 km2, the length of the glacier was 2.41 km, and the lowest end of the glacier was 3736 m above sea level. It is the largest scale in the Urumqi River Basin. Double glacier glaciers of modern glacier.