What's the story behind the ending of the journey to find relatives in the perfect world?

The story behind it is that Shi Hao's grandfather, Shi Zhongtian, was chased by adults to the Black Forest because he killed the baby on the battlefield in Baijiazhai. In order to find his grandfather, his parents, Mr. and Mrs. Shi, went to the battlefield in Baijiazhai to find his grandfather. That is, because his grandfather was lost, he stayed in Wu alone, and finally the Supreme Bone was dug out. This is the beginning of a story.