Bai Jingyang, 36, is the welding team leader of PetroChina Huanqiu Jilin Chemical Construction Engineering Co. Ltd.
His welding qualification rate has been maintained above 99%. Bai Jingyang was awarded the honorary title of National Model Worker. He has left reliable welds in a space the size of the palm of his hand. Some pipes have a diameter of 600 millimeters and a wall thickness of more than 40 millimeters, requiring two welders to work for more than 13 hours without interruption.