It seems that you can take bus No.76 (it's the fastest way to get off at Maigao Bridge and take the subway-it's only a short walk to Xinjiekou in Nanjing) or any other bus that can get to the central gate or Maigao Bridge, and you can change at will, and you can get to Daxing Palace or Xinjiekou (one stop away)! For reference only! Have a nice trip! Danyang Fengzhongtong-Xiao Chen, thank you