Chapter 40

Department of Night Assistant Training [夜部助理养成 Yè Bù Zhù Lǐ Yǎng Chéng] is the fortieth chapter of Tong Yao's Guardians of Night.

Summary
As he walks down a street, Che Yongtai sees a young girl asking her mom to buy her things. He thinks that money seems to be needed to do anything in the human world. He then tries to create money using magic but is unable to, causing him to wonder if doing so goes against the rules of the universe. Che Yongtai then sees a girl ask her boyfriend for a new phone, with the latter angrily telling her that they just came back from a tour and do not have the money for it. The girl then calls him stingy and storms off, with the man following behind her and apologizing. Che Yongtai concludes that not girls dislike and avoid people without money, and tries to think of a way to earn money.

Che Yongtai then spots Ye Yan. Recognizing the Nightwatcher, he walks up to him and asks him how to make money. Ye Yan informs him that he can earn money by working for someone, but Che Yongtai refuses, stating that he will not be a servant for small fries. As a solution, Ye Yan gives him a card with a phone number on it and tells him to dial the number to earn money while also giving him change to use a pay phone. He then hurriedly runs away, hoping that the demon lord does not remember about his armor and praying to never meet him again. As Che Yongtai dials the number on the card, revealed to be a hotline for selling kidneys, he remarks that the human world is fascinating.

Meanwhile, Wuren is training Li Lingbiao on the duties of a Department of Night assistant somewhere in the city. He explains that they are responsible for helping the guardians handle the aftermath of supernatural battles, since social unrest could occur if a normal person who witnessed the unrealistic incidents was not properly taken care of. Wuren then introduces the monster at his side, who he explains can intentionally reveal its true form and become visible to normal humans. While Li Lingbiao remarks that there is no difference, Wuren directs his attention to two nearby civilians, who are visibly disturbed by the appearance of the monster. Wuren then introduces the Memory Erasing Punch and explains its principles. Due to being an executive department of the government, the Department of Night is able to put a special chemical agent in its powder form in every gas stations' gasoline pumps with the aid of the CNPC, which is then pumped into cars and spread through the air when burnt. Anyone who smells the exhaust gas is under the effects of the chemical, though it has no effects due to the extremely low amount of dosage and requires an external force to activate. When someone possessing spiritual energy and wearing a specific energy channeling leather glove hits a person who has inhaled this chemical hard enough that it would give them a shock, the agent will be triggered and affect the person's memories by erasing their memories of the supernatural and activate their brain's memory replacement mechanism to replace it with something logically normal to themselves.

Wuren then demonstrates the technique by punching the two bystanders across the face, whose memories of the monster are subsequently erased and are replaced with the logical explanation of hallucinating after watching too many science fiction movies. Wuren then notes that there is one more person who witnessed the monster's appearance who is sitting nearby and tasks Li Lingbiao with executing the technique on them. As Li walks up to the civilian, they stand up and reveal themselves to be a physically imposing man, shocking Li.

Chapter Notes

 * Che Yongtai is advised by Ye Yan to sell his kidney for money.
 * Wuren explains the principles behind the Memory Erasing Punch.
 * Li Lingbiao is tasked with erasing the memories of a burly man.