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Privacy Policy
Effective Date: July 23, 2026
1. Information We Collect
We collect the following information to provide and improve our Service:
- Telegram user data: Your Telegram user ID, username, and language preference (collected automatically when you interact with our Bot)
- Conversation data: Text and voice messages you send to the Bot for Chinese language practice
- Usage data: Practice session count, HSK level selection, scenario preferences
- Payment data: Transaction records processed by our payment provider (Waffo Pancake). We do not directly store your credit card information
2. How We Use Your Information
We use collected data for:
- Providing the AI Chinese conversation service
- Processing speech-to-text and text-to-speech conversions via third-party APIs (Alibaba Cloud NLS)
- Generating AI responses via DeepSeek API
- Managing subscription and access control
- Improving the Service quality and user experience
3. Third-Party Services
We use the following third-party services to deliver the Service:
- DeepSeek API: AI conversation generation. Conversation text is sent to DeepSeek for processing per their privacy policy
- Alibaba Cloud NLS: Voice message processing (speech recognition and synthesis). Audio data is sent to Alibaba Cloud per their privacy policy
- Waffo Pancake: Payment processing. Payment data is handled by Waffo per their privacy policy
- Cloudflare: Service hosting and delivery. Cloudflare processes web traffic per their privacy policy
- Telegram: Bot communication platform. Message delivery is handled by Telegram per their privacy policy
4. Data Storage
User data is stored on Cloudflare infrastructure (Workers KV). We retain:
- User preferences and subscription status: until account deletion
- Conversation data: processed in real-time, not permanently stored
- Usage statistics: anonymized and aggregated for service improvement
5. Data Security
We implement industry-standard security measures:
- All API communications use HTTPS encryption
- API keys and secrets are stored as Cloudflare Workers secrets (not in code)
- Payment data is handled exclusively by our PCI-compliant payment provider
- No sensitive data is stored in client-side code or public repositories
6. Your Rights
You have the right to:
- Access your stored data by contacting us
- Request deletion of your account and associated data
- Withdraw consent for data processing at any time (which may affect Service availability)
- Object to processing of your data for service improvement purposes
7. Children's Privacy
The Service is not directed to children under 13. We do not knowingly collect data from children under 13. If we learn we have collected such data, we will delete it promptly.
8. International Users
The Service is available globally. Your data may be processed on servers in different countries. By using the Service, you consent to the transfer of your data to our service infrastructure and third-party processors in various jurisdictions.
9. Changes to This Policy
We may update this Privacy Policy periodically. We will notify users of significant changes via the Telegram Bot or email. Continued use after changes constitutes acceptance.
10. Contact
For privacy-related questions or data requests, contact us at: