Nurhachu why for crows

Nurhachu's ancestor Fancha once caught up with the country riots and rebellions, took advantage of the chaos to run into the wilderness, the country people chased, look to die, suddenly, a magical scene appeared: a large group of crows flew out, and have landed on the head of Fancha. Since Fancha was rather dirty, and the crows cooperated with him, he looked like a withered tree trunk from afar. The crows saved his life, so Nurhachi offered them to him. Adoption of pro!