42company shandong liudian new energy technology co., ltd. 1 based on internet big data, it integrates upstream and downstream resources of the industry to provide comprehensive, professional and efficient information and talent services for the thermal hvac industry. it is responsible for promoting the development of energy conservation and environmental protection and promoting the development of the thermal information power industry. it aims to become the world's most professional and professional hvac information platform with the most professional services. 30 gas
