Postcard - a letter sent from the underworld. ++Han Yi thought he was just an ordinary college student, but he didn't expect that he, a part-time courier boy, would deliver such a weird package. When he, a courier in the human world, met Shanhuai, who was also a courier in the underworld, he started to bump into ghosts frequently. What does the underworld courier deliver? Shanhuai told him that the so-called underworld couriers are soul messengers. The things they deliver include letters, words and objects, and these things delivered to the human world will appear in the minds of the recipients in the form of dreams. This may be what people call dreams. Han Yi wanted to stay away from this guy, but the cause and effect of his past and present lives had already destined him to be bound to Shanhuai for the rest of his life.
