SDH is committed to protecting the privacy and security of all information collected through this website. We fully acknowledge and respect the data privacy and protection rights of all website visitors. This policy sets forth the complete standards for the collection, usage and management of user information on our website, clarifying our principles for data processing.

Definition of Terms

The following definitions shall apply throughout this Privacy Policy:
1. “Visitor” means any individual who accesses the official SDH website available at www.sdh-tech.com, hereinafter referred to as “you”.
2. “SDH” may be interchangeably referred to as “we”, “us”, or “our” throughout this Policy.
3. “Personal Information” refers to any information recorded in any format that identifies a specific natural person, or from which the identity of a natural person can be indirectly inferred or determined.

Scope of Collected Personal Information

SDH only collects and stores personal information actively submitted by you. Such information is exclusively used for your requests for printed materials and subscriptions to our official email newsletters. Except for the information voluntarily provided by users, we will not additionally collect or store any user-related data during website operation.

Website Logging Practices

To ensure stable website operation, we log HTTP requests sent to our server, including the IP addresses of website visitors. An IP address is a standard network identifier automatically assigned to devices or Internet Service Providers (ISPs) when accessing network URLs.
Our logging practice is a passive data collection process. We do not use cookies, web bugs or any other tracking technologies to actively retain user personal information. All logged clickstream data is stored in a non-personally identifiable form and is solely used by our internal staff and authorized contracted service providers for website system administration, operation and maintenance analysis, site optimization and operational evaluation. All log files are archived exclusively for system analysis, technical maintenance and website assessment purposes and will not be used for any unauthorized purposes.

Policy Revision Rights

We reserve the right to review, adjust and revise this Privacy Policy and relevant data processing practices at any time in accordance with operational needs, industry standards and applicable legal and regulatory requirements.

Information Usage and Disclosure

SDH will not share, exchange or lend your personal information to any third parties, except for administrative purposes and for use by contracted service providers who strictly comply with our privacy and confidentiality policies.
Our electronic newsletters and email communications are only delivered to stakeholders with their explicit consent. If you subscribe to our email newsletter, we only collect your email address. Every promotional or informational email we send will contain clear and detailed unsubscribe (opt-out) instructions for you to remove yourself from our mailing list at any time.
All email statistics collected are used solely for internal evaluation to measure the effectiveness of our email campaigns and communications.

Legal Circumstances for Information Disclosure

We may use or disclose Personal Information under the following justified and permitted circumstances:
1. When required by applicable laws, court orders or government tribunal rulings;
2. When necessary to protect the legitimate rights, privacy, safety or property of any identifiable individual or group;
3. To pursue legal remedies or mitigate potential damages and liabilities;
4. When the relevant information is already in the public domain.
In all cases where information disclosure is legally required or permitted without user consent, SDH shall only disclose the minimum information necessary to fulfill the corresponding legal or operational requirements.