The 28-year-old striker opened the scoring 12 minutes into the encounter after receiving a pass from Zhang Yuning.
Bakambu completed his brace in the 19th minute off Renato Augusto's assist for his fourth goal of the season.
Augustos sealed the commanding performance for the Imperial Guards with his strike in the 62nd minute,
Bakambu featured for the duration of the game in his fourth league appearance this season for Roger Schmidt’s men.
The victory means Beijing Guoan have now won all their nine games this season to strengthen their lead on the table with 27 points.