Privacy Policy

1. Overview

Guangdong KST Optical Co., Ltd. ("KST," "we," "us," or "our") is a high-end optical equipment and visual lighting source manufacturer founded in June 2011 and headquartered in Dongguan, Guangdong Province, China (Stock Code: 874636). We specialize in the research, development, production, sales, and servicing of PCB Laser Direct Imaging (LDI) equipment, CCD alignment LED exposure machines, and related optical solutions.

This Privacy Policy explains how KST and its subsidiaries -- Ganzhou KST Optical Co., Ltd., Rsee Lighting Technology Co., Ltd., Dongguan Krun Intelligent Equipment Co., Ltd., and Wuhan KST Software Co., Ltd. -- collect, use, store, share, and protect personal information obtained through our websites, products, services, and business interactions.

By accessing our website, using our products or services, or engaging with us in any business capacity, you acknowledge that you have read and understood this Privacy Policy.

KST operates under the ISO 9001:2015 Quality Management System and holds recognition as a National High-Tech Enterprise, National "Little Giant" Enterprise, and 2024 Provincial Manufacturing Single Champion Enterprise in Guangdong Province. We apply the same rigor to data protection that we apply to our manufacturing standards.

2. Information We Collect

We collect the following categories of personal information depending on how you interact with us:

Identity & Contact Data

Full name and job title
Company name and address
Email address and phone number
Country and region

Business & Transaction Data

Purchase orders and invoices
Product inquiries and RFQs
Service requests and warranties
Payment and billing records

Technical & Usage Data

IP address and browser type
Pages visited and time spent
Device identifiers
Referral sources

Communications Data

Email and message correspondence
Exhibition and event registrations
Newsletter subscriptions
Support ticket history

We do not knowingly collect sensitive personal data such as health information, government ID numbers, or financial account credentials unless strictly required by applicable law or contractual necessity.

3. How We Use Your Information

We process your personal information for the following lawful purposes:

Contract Performance: Processing orders for LDI equipment, LED exposure machines, and related optical products; managing delivery, installation, and after-sales services.
Customer Support: Responding to technical inquiries, warranty claims, maintenance requests, and product support related to our optical equipment portfolio.
Marketing & Communications: Sending product updates, technical bulletins, industry news, and promotional materials -- only where you have provided consent or where legitimate interest applies.
Research & Development: Using aggregated and anonymized usage data to improve our equipment design, software systems (via Wuhan KST Software Co., Ltd.), and manufacturing processes.
Legal Compliance: Meeting obligations under Chinese law (including the Personal Information Protection Law, PIPL), export control regulations, and applicable international standards.
Security & Fraud Prevention: Protecting the integrity of our systems, preventing unauthorized access, and safeguarding our intellectual property portfolio of 200+ authorized patents.

4. Sharing & Disclosure

We do not sell, rent, or trade your personal information to third parties. We may share your information only in the following limited circumstances:

KST Group Subsidiaries

Information may be shared among our four subsidiaries to fulfill orders, coordinate production, and provide integrated services. All subsidiaries are bound by this Privacy Policy.

Authorized Service Providers

We engage trusted third-party vendors for logistics, IT infrastructure, payment processing, and customer communication platforms. These providers process data solely on our behalf under strict contractual obligations.

Legal & Regulatory Authorities

We may disclose information when required by law, court order, or government authority, including compliance with China's PIPL, Cybersecurity Law, and relevant export control regulations.

Business Transfers

In the event of a merger, acquisition, or sale of assets, personal information may be transferred as part of the transaction. We will notify affected individuals prior to any such transfer.

5. Cookies & Tracking Technologies

Our website uses cookies and similar tracking technologies to enhance your browsing experience and analyze site performance. The types of cookies we use include:

Cookie Type	Purpose	Duration
Essential	Required for site functionality and security	Session
Analytics	Measure website traffic and user behavior	Up to 2 years
Functional	Remember language and region preferences	1 year
Marketing	Deliver relevant product and industry content	90 days

You can control or disable cookies through your browser settings. Note that disabling certain cookies may affect the functionality of our website. For detailed cookie management, please refer to your browser's help documentation.

6. Data Security

Consistent with our ISO 9001:2015 Quality Management System, we apply rigorous technical and organizational security measures to protect your personal information against unauthorized access, alteration, disclosure, or destruction.

Encryption

TLS/SSL encryption for all data in transit; AES-256 for data at rest

Access Control

Role-based access with multi-factor authentication for internal systems

Audits & Reviews

Regular security audits and vulnerability assessments aligned with ISO standards

In the event of a data breach that poses a risk to your rights and freedoms, we will notify the relevant supervisory authorities and affected individuals within the timeframes required by applicable law.

7. Data Retention

We retain personal information only for as long as necessary to fulfill the purposes described in this policy, or as required by applicable laws and regulations. Our general retention guidelines are:

Customer & business transaction records 7 years

Product warranty and service records Warranty period + 3 years

Marketing and communication preferences Until opt-out

Website analytics data 2 years

Legal and compliance records As required by law

When personal information is no longer needed, we securely delete or anonymize it in accordance with our data destruction procedures.

8. Your Rights

Depending on your jurisdiction, you may have the following rights regarding your personal information. We are committed to honoring these rights in accordance with applicable law, including China's Personal Information Protection Law (PIPL) and, where applicable, the EU General Data Protection Regulation (GDPR):

Right to Access

Request a copy of the personal information we hold about you

Right to Rectification

Request correction of inaccurate or incomplete information

Right to Erasure

Request deletion of your personal data where legally permissible

Right to Object

Object to processing for direct marketing or legitimate interest purposes

Right to Portability

Receive your data in a structured, machine-readable format

Right to Restrict Processing

Request limitation of processing in certain circumstances

To exercise your rights: Please submit a written request to our Data Protection Officer at privacy@kstoptical.com. We will respond within 30 days of receipt. Identity verification may be required before processing your request.

9. International Data Transfers

As a manufacturer serving global markets, KST may transfer personal information across national borders in connection with our business operations. When transferring personal data internationally, we ensure that appropriate safeguards are in place, including:

Compliance with China's PIPL cross-border data transfer requirements, including security assessments and standard contractual clauses where required
Contractual protections with international partners, distributors, and service providers to ensure equivalent data protection standards
Adherence to applicable data protection laws in recipient countries, including GDPR for transfers to or from the European Economic Area

10. Children's Privacy

KST's products and services are designed exclusively for business-to-business (B2B) use by professionals in the electronics manufacturing, PCB production, and optical industries. Our website and services are not directed at individuals under the age of 18. We do not knowingly collect personal information from minors. If we become aware that we have inadvertently collected such information, we will promptly delete it. If you believe we may have collected information from a minor, please contact us immediately at privacy@kstoptical.com.

11. Changes to This Policy

We may update this Privacy Policy periodically to reflect changes in our business practices, legal requirements, or data protection standards. When we make material changes, we will:

Update the "Last Updated" date at the top of this page
Post a prominent notice on our website homepage
Notify registered users and active business partners via email where required by law

Your continued use of our website or services after the effective date of any updated policy constitutes your acceptance of the revised terms.