Do Jinan people have a grudge against Shanghai people?

There shouldn't be, but according to the old man, it turned out that southerners came to the north to steal things and stole melons, so there were no melons in the north and there were melons in the south. Also, there used to be a "unique place" on Yanzi Mountain in Jinan. Southerners say that Feng Shui in Jinan City depends on this "unique". Without this "Jue", Jinan City would be gone, but the southerners smashed it, and then Jinan City fell. Of course, this is what the old man said. It should be in War of Resistance against Japanese Aggression.