Privacy policy

Last Updated: January 2026

At Shenzhen Qiangzhong E-commerce Co., Ltd. ("we," "our," or "us"), we value your privacy and are committed to protecting your personal data when you shop with Dumfume. This Privacy Policy explains how we collect, use, and share information when you visit or make a purchase from our website (https://dumfume.cn).

1. Personal Information We Collect

We may collect the following categories of personal information:

Contact Information: name, shipping and billing address, email address, phone number
Order Information: products purchased, returned, exchanged, or viewed, order history, payment status
Payment Information: payment method details processed securely by third-party payment providers
Technical Information: IP address, browser type, device information, cookies, and usage data
Account Information: login credentials and preferences (if you create an account)
Customer Support Information: communications with our support team

2. How We Use Your Personal Information

Process and fulfill orders, including payment, shipping, and delivery
Communicate with you regarding orders, services, and support inquiries
Provide a personalized shopping experience and improve our website
Send promotional or marketing communications (you may opt out at any time)
Detect, prevent, and address fraud or security issues
Comply with applicable laws, regulations, and legal obligations

3. How We Share Your Personal Information

We may share your personal information with trusted third parties only as necessary to operate our business, including:

E-commerce Platform Providers: such as Shopify, to operate our online store
Payment Processors: to securely process transactions
Logistics and Shipping Partners: to fulfill and deliver your orders
Marketing and Analytics Providers: to help us improve our services
Legal or Regulatory Authorities: when required by law or to protect our legal rights

4. Shipping and Regulatory Compliance

For products containing LiFePO₄ batteries or other regulated components, we may share necessary shipment and compliance-related information (such as product classification, safety documentation, or customs details) with certified logistics partners and relevant authorities to ensure safe, lawful, and compliant delivery.

5. Data Security

We implement reasonable technical and organizational safeguards to protect your personal information against unauthorized access, loss, misuse, alteration, or disclosure. However, no method of transmission over the internet is completely secure.

6. Your Rights

Depending on your jurisdiction, you may have the right to:

Access the personal information we hold about you
Request correction of inaccurate or incomplete data
Request deletion of your personal information
Object to or restrict certain processing activities
Opt out of marketing communications
Request data portability where applicable

To exercise these rights, please contact us at dumfumeofficial@gmail.com. We will respond to legitimate requests within 30 days.

7. Cookies

We use cookies and similar technologies to enhance website functionality, analyze traffic, and improve user experience. You can manage or disable cookies through your browser settings.

8. Children’s Privacy

Our website and services are not intended for children under the age of 18. We do not knowingly collect personal information from minors.

9. International Data Transfers

Your information may be transferred to and processed in countries outside your country of residence. We take appropriate measures to ensure your data remains protected in accordance with this policy.

10. Data Retention

We retain personal information only for as long as necessary to fulfill the purposes described in this policy, unless a longer retention period is required or permitted by law.

11. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated "Last Updated" date.

12. Contact Us

If you have any questions about this Privacy Policy or our data practices, please contact us:

Email: dumfumeofficial@gmail.com

Postal Address:
Shenzhen Qiangzhong E-commerce Co., Ltd.
Room 603, Building D, Donghaiwang Industrial Park,
No. 369 Bulong Road, Longgang District,
Shenzhen 518129, China