Service network covering the whole country of the Great Wall lubricating oil system, four research and development center, five big sales center, five big tech support center staff as a powerful technical support services, when the customer in the sale, the problems appeared in the process of using oil, five sales center staff will be on-site service at the first time.
National Hotline : +86-400-810-9886, +86-800-810-9886
SINOPEC : http://www.au-doors.com 
SMS platform : 1065-7500-9886
MSN : csc@au-doors.com
