We only use collected personal data to complete order fulfillment, after-sales service processing, account security maintenance, onsite function optimization and legitimate service communication. We implement layered access control for internal staff, encrypted server storage and regular security inspection to prevent unauthorized access, alteration and leakage of user private data. We will not sell, trade or rent your identifiable personal information to outside parties for commercial marketing purposes without your explicit written consent. You reserve the right to update, amend or delete your personal account information at any time via account setting portal. We may revise this policy occasionally to match updated data protection standards, and revised terms will be posted publicly on this page with updated effective date.