How did the Manchu and Han communicate with Hunchun as the "ban in the ban" of the northeast ban policy in the Qing Dynasty?

How did the Manchu and Han communicate with Hunchun as the "ban in the ban" of the northeast ban policy in the Qing Dynasty?
In the fifty-third year of Kangxi, the Qing government set up eight banners garrison in Hunchun, from which Hunchun formed a military control society dominated by flag men.

in the 53 year of Emperor Kangxi, the Qing government set up the eight banners garrison in Hunchun. As a result, Hunchun formed a military control society dominated by the flag man. Coupled with the clear ban policy, the communication between Manchu and Han showed a special tendency, but as a result, the two sides still had a deep emotional identity.

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