Deep in the Phoenix Ridge of Xiuwu Country, Henan province, a group of ordinary people is working attentively on an extraordinary work. They are road workers on the cliff of Yuntai Mountain. Balancing themselves two hundred meters off the ground, these workers have to set up scaffoldings, drill holes, and anchor screws into rocks carefully and steadily. Spending most of their day on the cliff, they are known as the “spider-man of the cliff”.