How are the telephone poles erected in the mountains?

Because of the advanced technology, there are more and more ways to use telephone poles in deep mountains.

Tower materials and concrete are usually dragged up by people's backs or mules and horses, and sometimes a simple cableway is built when the tower is too heavy. After the completion of the construction of the iron tower, the guide rope is usually laid with a power umbrella or motorboat, and then the rope is continuously reversed, and then the conductor can be pulled. Just pull one or three lines with a tractor. No parachute was used to lay the guide rope with mortar before.