The SOC 1 report is based on AT-C section 320 in the Statement on Standards for Attestation Engagements (SSAE) No.18, and is issued to certify the internal control of service organizations. This report indicates that Huawei Mobile Services has established an appropriately designed internal control system that runs effectively, based on the requirements of the SSAE No.18. The SOC 2 and SOC 3 reports are based on TSP section 100 (2017 version) formulated by the American Institute of Certified Public Accountants (AICPA), and are used to certify the internal control design, with regard to the security, availability, and confidentiality of a service system. These reports indicate that the design for Huawei Mobile Services in these areas enjoys an industry-leading status.