Which novel described a jindan the size of a millstone?

There was a jindan the size of a millstone in the novel "There's a Yama's Palace in the Dantian."😋I recommend to you "There's a Yama's Palace in the Dantian". The protagonist found a huge millstone in the Dantian, and there was a golden core in the millstone. This was also the opportunity for him to rise. I hope you like this fairy's recommendation. Muah ~😗