Why is Qiang Qin beheading Han Xin's mother a ghost?

Mom is dead. In Han Xin, Han Xin said that his mother was buried alive in Jiulishan, so in the following plot, Han Xin's mother appeared as a ghost. Han Xin, also known as Weiyang Palace, is a Shaanxi opera. It tells the story of Emperor Gaozu Chen, who was ordered to go to war when he rebelled, and Liu Bang personally went to crusade and appointed a supervisor. Lv Hou has long been wary of Han Xin's power and ingenuity, and hopes to be punished. This time, Liu Bang went to counter-insurgency, made suggestions with Xiao He, and killed Han Xin in Weiyang Palace, thus committing the crime of private drive and falsely beheading him.