"In our mining area, the older generations always built the roofs of their houses with them. After long exposure to a dry environment, the roofs would be stronger and more durable."

Xu had more than 20 students, but after all these years, Zhao has become the only one in the area still practicing the craft.

Although currently alone in doing so, Zhao still hopes to nurture young people to carry on his legacy. He often goes to local schools to teach pupils to make simple structures with stalks, in an attempt to spark their interest.

"I hope there will be young people who fall in love with it in the future and join me to help pass on the craft," Zhao says.