Reconstructed with cardboard boxes, with ventilation holes around and movable wooden doors. Ms. Zhang said that a flashlight was inserted into the ventilation hole of the cat cage. One of the two ropes held the cat cage and the other controlled the movable door, and put the cat cage with food in the ventilation shaft. Cats can observe the change of light when eating, so they can put down the wooden door and hang the cat cage on the ground. The climbing frame made of broom is wrapped with woven bags and old clothes, which can help cats climb up. The ladder has 10 floors, and the triangular boards are fixed with ropes after being punched, each floor is 30-40 cm high, and the directions are staggered, with pig liver and fish. On February 17, Ms. Zhang found that the food in the cat cage did not move, and neither did Xiaohua Mall. The next day, she changed the fish head and called for a long time. Suddenly, a familiar cat meowed in the parking lot. "Did it climb up by itself?" Ms. Zhang followed the sound and found a Xiaohua Mall in front of her eyes. She and Ms. Deng repeatedly confirmed that it was indeed Xiaohua Mall who fell into the well. Then they informed the property and reminded to seal the entrance of the ventilation shaft.