The 70-year-old man was trapped in the deep mountain and the fire was successfully rescued. What difficulties did he experience in the rescue process?

1. When the firemen descended to the position of 10 meter, the rescue was interrupted because the entrance was too narrow to enter.

2. As time goes by, the temperature drops at night, and rescuers take various methods to rescue. After repeated communication with the trapped old man, the team members first put the rope tied with a flashlight into the depths of the hole, so that the trapped old man could wrap his waist with a rope. After being carried out about 2 meters, the trapped old man screamed in pain and the rescue was forced to suspend.

3. Invite the local villagers to clear the clods near the hole bottom with hoes, and expand the hole diameter to 0.8 meters ... A thin rescuer came in with a safety belt. After many attempts, it finally reached the bottom of the cave through the narrow part of the cave. The trapped old man was bruised in many places, his legs were broken and he was too weak to move. After the rescuers helped the trapped elderly to fasten their seat belts, the rescuers pulled them up together, and the trapped elderly were stuck when passing through the narrow part, and the rescue was interrupted again.

4. The rescue plan was adjusted again. The mountain rescue team made a fixed sliding group system with tree trunks, sent experienced mountain rescue team members into the caves again, added rope protection points and direction points for the trapped elderly, and changed the direction and position of the trapped people from different positions and angles. Due to the narrow cave, uneven rock wall and little operating space, rescuers finally rescued the trapped elderly on 27th 19: 52, which lasted 17 hours, and handed them over to the on-site medical staff and sent them to the hospital.