Shandong Huidangjia Electric Appliances Co., Ltd.is mainly engaged in the research and development, production and sales of carbon crystal products as a specialized company. The company is committed to the application of carbon crystal technology in civil and public heating projects. The products are widely used in civil, office, commercial, industrial, agricultural, transportation and medical fields, and they are mainly used in heating homes, due to their outstanding performance, low price, low electricity cost, wide application, easy installation and low carbon environmental protection. Office heating, industrial heating and commercial heating, to meet the heating needs of the majority of users. Product safety and energy saving, environmental protection and comfort, and has the effect of health and health, won the trust of consumers and customers.