Crossing the underworld?!
Xin Huohuo had heard of this term before. It was said to be a skill mastered only by those who could travel between the worlds of the living and the dead. She had seen it mentioned online and heard many similar stories in various legends.
Sometimes, a relative would pass away with many things left unsaid, necessitating communication between the two worlds. Other times, a loved one would depart, and the living desperately hoped to see them one last time. In some cases, excessive longing would lead to grief so intense it manifested as illness. There were also instances of crossing the underworld for medical reasons. When someone had an illness that couldn't be cured, they would ask a practitioner to go to Yama Hall and check the Life and Death Book, or to inspect the aura of sickness to determine the true nature of the illness, so they could find the right treatment back in the world of the living.
