Zhao Wenwu checks a drone at an office in Dalian Power Supply Company on Sept 28, 2016. [Photo by Wu Yan/chinadaily.com.cn]

"We thought of many ways to hang a rope on the targeted cable," said Zhao, adding that they even tried to use bow and crossbow to let arrow bring a rope, which connects the rope ladder on the other end, flying across the cable.

They also tried model airplane. Several young workers practiced to fly model airplane on computer simulation at first and then in reality in spare time for three months in 2012. They did many experiments and even damaged a model airplane.

"It is too hard to control," said Zhao, "We hope it flies steadily rather than fast."

Fortunately, they heard of a new type of drone available in the market. "We tried drones and they work very well," said Zhao with a smile. This innovation was recognized by the industry and brought a reward to his company.

"He always tells us to think what is the hardest part in the latest task and find a solution," said 30-year-old Nie Lu, a member of Zhao's team.

"I hope all teammates can be better than me," said Zhao, who is the oldest and most experienced worker in the team. "Do best everyday work and make yourself the best, then others will recognize you."

An undated photo shows three workers climbing up a transmission tower during a task in Dalian, Northeast China's Liaoning province. [Photo provided to chinadaily.com.cn]