If you don't take the through train, you'd better take the early bus to Xinyang first, and then take the bus to the mall. You can arrive on the same day.
As for Hongyun or Yun Xin, it doesn't matter. Luck is relatively better. Now the fare should be around 45 yuan.
You can't take a bus to the mall at Nanjing Road or Pingqiao intersection, but you must walk two kilometers at Pingqiao intersection.
There is no good train by train. You should arrive in Xinyang before two in the afternoon.
Do you think the train can still go now?