Book of Paranormal Events

"Do you believe there are ghosts in the world?" At six o'clock in the morning one day, Chen Yu woke up from his dream with a knock on the door. After opening the door, no one was found, but there was an extra cardboard box in front of the door. Chen Yu, who mistakenly thought it was a prank, took the cardboard box back and opened it What appeared inside the cardboard box surprised Chen Yu - a square box ten centimeters long and ten centimeters wide appeared in front of him. "Are you playing with matryoshka dolls here?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.