Last updated: January 1, 2026
This Privacy Policy describes how information is collected, used, and protected on the website https://www.williamzhang.us (the “Website”), a personal website operated by William Zhang (“we,” “our,” or “us”). The Website may include informational content and limited ecommerce functionality.
1. Information We Collect
a) Information you provide voluntarily
We may collect information when you place an order, contact us, or submit information through forms on the Website, including:
- Name
- Email address
- Billing and shipping address
- Order and transaction details
- Messages or inquiries you submit
This information is collected only when you choose to provide it.
b) Automatically collected information
When you visit or interact with the Website, certain technical and usage data may be collected automatically, including:
- IP address
- Browser type and version
- Device type
- Pages visited and links clicked
- Date and time of visits
- General navigation and interaction data (such as page views and clicks)
This data is used in an aggregated manner to operate, maintain, and improve the Website’s functionality, performance, and security.
2. Ecommerce and Orders
The Website may offer ecommerce features that allow users to purchase products or services. When you place an order, we collect the information necessary to process transactions, fulfill orders, provide customer support, and maintain transaction records.
We do not use order information for unrelated purposes and do not sell personal information.
3. Payment Processing (Stripe and PayPal)
Payments on the Website are processed securely through third-party payment processors, including Stripe and PayPal. When you make a purchase:
- Payment information (such as card details or payment account information) is processed directly by the payment processors
- We do not store full payment card numbers or sensitive payment credentials on our servers
- Payment transactions are subject to the privacy and security practices of the respective payment providers
For more information, please review: Stripe Privacy Policy and PayPal Privacy Statement.
4. Shipping and Logistics (UPS)
To calculate shipping rates and fulfill orders, the Website may use shipping carrier services such as UPS via API integrations. In order to provide shipping estimates and complete deliveries, limited shipping-related information (such as name, shipping address, city, state, postal code, and destination country) may be shared with UPS as necessary for shipping rate calculation, label generation, and order fulfillment.
5. Cookies and Website Functionality
The Website may use cookies and similar technologies to support core functionality, such as shopping cart features, checkout processes, security, and basic site operation. Cookies may also be used to improve user experience and website performance. You can manage or disable cookies through your browser settings.
6. How We Use Information
We use collected information to:
- Operate and maintain the Website
- Process orders and transactions
- Provide customer support and respond to inquiries
- Fulfill shipments and logistics
- Improve website functionality and performance
- Ensure security and prevent misuse or fraud
7. Third-Party Services
The Website may rely on third-party service providers to support operations, including:
- Payment processors (Stripe and PayPal)
- Shipping and logistics providers (UPS)
- Hosting and infrastructure providers
These third-party providers may process data in accordance with their own privacy policies and only to the extent necessary to provide their services.
8. Data Retention
We retain order, transaction, and communication data only as long as necessary to fulfill orders, provide support, maintain records, and comply with applicable legal and accounting obligations.
9. Data Security
Reasonable technical and organizational measures are implemented to protect information from unauthorized access, disclosure, alteration, or misuse. However, no method of transmission over the Internet or electronic storage is completely secure.
10. Children’s Privacy
This Website is a personal website and is not specifically directed toward children under the age of 13. We do not knowingly collect personal information from children.
11. Your Privacy Rights
Depending on your location, you may have rights to request access to, correction of, or deletion of personal information, and to withdraw consent for non-essential data collection where applicable.
12. Updates to This Privacy Policy
This Privacy Policy may be updated from time to time to reflect changes in website functionality, legal requirements, or operational practices. Any updates will be posted on this page with a revised “Last updated” date.
13. Contact
If you have any questions about this Privacy Policy or data practices related to the Website, please contact:
Email: info@williamzhang.us
Website: https://www.williamzhang.us