164300。 According to the postal code database, we can know that the postal code of Aihui District in Heihe City is 164300. The postcodes of subordinate addresses in Aihui District, Heihe City, Heilongjiang Province are 164300, 1643 1, 1643 12, 16432 1,/kloc. 164333、 164334、 164343、 16435 1、 164353、 164354、 164355、 164356、 164399。