Linyuan road. According to Baidu map, the place where Changchun welds chair legs is called Bai Gang Electric Welding Processing, which is located next to the west gate of Linyuan Road Market, Chaoyang District, Changchun City, Jilin Province. Electric welding refers to a welding method that uses electric energy, heating or pressure, or both, with or without filler to realize atomic bonding of weldments.