This is the official after-sales telephone number of Great Wall Monitor: 4008 1 18888.
Complaint Tel: 0755-26728275
Maintenance point in Shenyang Hao San Street area:
Great Wall Computer Shenyang Customer Service Center, No.69 Nansanhao Street, Heping District, Shenyang
The telephone numbers are 024-23897593 and 23897327.