What does Han Xin mean by going to the Weiyang Palace?

"Han Xin quickly reported the ghost of Weiyang Palace" means "Han Xin will die in Weiyang Palace, which is retribution from the underworld".

Supplement:

From:

From the Beijing opera "Fishing for Scarabs"

Commentary: Legend has it that Han Xin learned that there was a treasure trove of geomantic omen here, buried his parents' bones there and became a rich man himself.

But Han Xin couldn't wait, so he tricked me into burying me alive. Later, he was indeed worshipped by Liu Bang.

But because he was unfilial, he was punished in Weiyang Palace and killed by Lv Hou.