There are Wacom service points in Guangzhou. You can view the service point information in Wacom website-Service Support:
/support/Repair.php? parent_id=25
Thank you for your support of Wacom. If you have any questions, please call our service hotline 4008 105460? Or contact our customer service through the website "Online Service" (customer service time: Monday to Sunday 9:00- 18:00).