How did Songhua River come into being?

Songhua River is formed by cold weather and freezing. In early winter, when the temperature drops below zero, ice crystals will first form in the river. As the temperature drops, the ice crystals will get bigger and bigger, and the river will gradually freeze. At this time, the ice crystals suspended under the thin ice on the river surface are the Songhua River. Songhua River was called Nanhe in Sui Dynasty, Nashui in Tang Dynasty, Yahe and Huntongjiang in Liao and Jin Dynasties, and Huntongjiang and Songhua River in Qing Dynasty. Songhua River flows through Jilin and Heilongjiang provinces. The basin covers an area of 557,200 square kilometers, covering four northeastern provinces of Heilongjiang, Jilin, Liaoning and Inner Mongolia. The annual runoff is 76.2 billion cubic meters.