After-sales service of ZHANWANG INC. includes engine and compressor regular maintenance, repair, overhaul and treatment of the sudden fault, and we can provide operation management services for booster station. After-sales service range covers the whole country and the company sets service station in Deyang city of Sichuan province, Zhanjiang city of Guangdong province and so on.  After-sales service hotline 24 hours opening and maintenance personnel can arrive at the site within 4 hours in Sichuan area, with 48 hours outside Sichuan area to provide accurate, timely and efficient troubleshooting service for customer.