Qin Zhao squatted down and, beside the crack next to the exhaust pipe, discovered a bit of white powder.
She picked some up with her hand and examined it closely.
This looked like phosphorus powder?
Originally, she was unfamiliar with this material, but Chu Yan had taken over the study at home and placed plenty of experimental equipment in there. Sometimes, on weekends, he would conduct experiments that Qin Zhao couldn't understand.
Once, when she went in, she saw a pair of tweezers in his hand with an eerie, greenish flame on them. She thought he was defiling corpses and asked what it was.
Chu Yan said it was phosphorus powder and even showed it to her.
After a corpse decays, phosphorus can form on the bones, and phosphorus combusts spontaneously at high temperatures, which is why ghost fires often appear in the chaotic burial grounds in the countryside during summer.
