Zhu Rong and Huilu are Vulcan, which can be found in our ancient books. In ancient books, the word "fire" was replaced by the name of Hall. According to legend, Zhu Rong was Chi Di, the grandson of Zhuan Xu, one of the five ancient emperors. He taught people to use fire and killed the dragon. Zhu Rong's image is an official with black veil, red robe and white face. As for Huilu, his life experience cannot be clearly verified. As a Vulcan, he is more associated with fire. Historically, people often referred to fire as Hui Lu or Hui Lu disaster.