Last updated: 30 July 2026

Yisi is operated by Yisi AI Education (HK) Technology Limited, a company
incorporated in Hong Kong. Our full legal-entity and contact details are set
out below.

Customer support and privacy requests

For questions about Yisi, account access, learning features, privacy, correction or deletion requests, please contact us by telephone.

Please include enough context for us to understand your request, but do not send passwords or unnecessary sensitive information. For a personal-data request, please include the email address or account identifier connected to your request where possible. We may ask for reasonable verification before responding.

Company information

• Legal entity and service operator: Yisi AI Education (HK) Technology Limited
• Company registration number: 80694099
• Registered office: RM 801, 8/F, THE CLOUD, 111 TUNG CHAU STREET, Tai Kok Tsui, Hong Kong
• Customer support and privacy telephone: +86 186 1298 8016

See our Privacy Policy for information about personal-data rights.