A.
Call the national unified service hotline: 400-900-8158, and Heshan customer service staff will answer questions; if you need door-to-door service, the Heshan headquarters will directly send the order to the service engineer; Heshan is located in Beijing, Shanghai, Anhui, Guangdong , Chongqing, Sichuan, Hunan, Hubei, Fujian, Guangxi, Hainan, Zhejiang and other provinces and cities have resident service engineers.