Reverse Instruction

Ji Beiyan is the author. Every wish he writes down will be granted. He wanted the furnace to be cleaned, as the walls were beginning to corrode. He wished he was no longer hungry and then lost his sense of food. The first line he wrote in this world was on a piece of white paper "What do you wish for?" He found that every wish he wrote down would come true in the opposite form. He is still writing. He should know what he's doing. Because he can't stop.