Jingtai Road, Liu Jing Industrial Park, Nanning, Guangxi. The registered address of Nanning Jinding Welding Technology Vocational Training School is Jingtai Road, Liu Jing Industrial Park, Nanning, Guangxi. Founded in May 2003, the company is engaged in the design, production and installation of B-class boilers (steam boilers and water heaters) and organic heat carrier boilers. It is one of the national designated boiler manufacturers and one of the "three big" boiler manufacturers in Guangxi.