The Secret of Western Hunan

My great-grandfather once made his fortune by relying on a "Ghost Cauldron" passed down from his ancestors. It is said to be a magical weapon used by Emperor Wen of the Sui Dynasty to conquer the country. Legend has it that ghost soldiers can be mobilized to help, but there is no way to test it now. Because when it was passed down to my grandfather, he did not continue to use the "Ghost Cauldron" to continue to make a fortune, but instead the family fell into decline. But by some mistake, "I" learned that although my ancestors were glorious for a while, none of them could live beyond the age of forty. Only starting from my grandfather, the life span has increased. I followed my grandfather's footsteps and discovered a shocking secret...