ZDZD.ZDZD is a modernized enterprise group located in Dezhou, Shandong Province, focusing on the research and development of central air-conditioning and ancillary products, covering an area of 1,000 acres, with assets of 1 billion yuan, and its products are exported to Europe, America, Australia and more than ten countries. The company leads 12 series of more than 800 varieties of indoor/commercial central air-conditioning, purification equipment, glass fiber reinforced plastic products, covering the whole industrial chain, such as intelligent inverter units, cooling towers, fire fans, etc. The company is the first in the industry to pass ISO9001/14001 certification. The company is the first in the industry to pass ISO9001/14001 certification, and applies ERP system to realize digital control of the whole production process, and is famous for zero complaint management. The main products include central air-conditioning mainframe, terminal equipment, ventilation ducts and electrical control system, with technical strength and production capacity ranking the forefront in China.