Last updated: June 4, 2026
Top Line Circuit respects your privacy and is committed to protecting your personal information. This Privacy Policy explains how we collect, use, disclose, store, transfer, and protect personal information when you visit www.toplinecircuit.com, submit an inquiry, request a quotation, upload PCB/PCBA project files, communicate with us, or use our products and services.
For the purposes of this Privacy Policy, “Top Line Circuit,” “we,” “us,” and “our” refer to Shenzhen Topline Technology Co., LTD, unless another legal entity is identified in a written agreement with you.
If you do not agree with this Privacy Policy, please do not use our website or submit personal information to us.
1. Who We Are
Top Line Circuit provides PCB manufacturing, PCB fabrication, PCB assembly, PCBA processing, component sourcing, engineering review, testing, and related electronic manufacturing services.
Controller / Business name: Shenzhen Topline Technology Co., LTD
Website: www.toplinecircuit.com
Email: info@toplinecircuit.com
Phone / WhatsApp / WeChat: +86 13425156463
Address: The 3rd Floor, Building B3, Yanchuan North Industry Park, Yanluo Street, Bao’an District, Shenzhen, China
For privacy-related questions or requests, please contact us at info@toplinecircuit.com.
2. Information We Collect
We may collect the following categories of information.
Information you provide directly to us. This includes your first name, last name, company name, job title, email address, phone number, WhatsApp or WeChat details, country or region, shipping or billing details, project requirements, quotation requests, messages, and other information you choose to provide.
Project and technical files. When you request a quotation or place an order, you may upload or send Gerber files, ODB++ files, BOM files, CPL / Pick-and-Place files, Centroid files, schematics, drawings, specifications, assembly instructions, test requirements, images, spreadsheets, or other PCB/PCBA project materials.
Order, transaction, and service information. This may include quotation history, order details, product specifications, manufacturing requirements, component sourcing information, quality control records, testing requirements, delivery information, invoices, payment status, and customer support records.
Website and device information. When you visit our website, we may collect IP address, browser type, device type, operating system, language settings, referring pages, pages viewed, time and date of visits, click activity, cookie identifiers, and similar technical information.
Communications information. We may keep records of emails, form submissions, WhatsApp/WeChat communications, customer support messages, and other communications with you.
We do not intentionally collect special categories of personal data, such as health information, biometric data, racial or ethnic origin, political opinions, religious beliefs, or criminal offence data. Please do not include such information in forms, messages, or uploaded files unless we specifically request it and have a lawful basis to process it.
3. How We Use Your Information
We use personal information for the following purposes:
To respond to inquiries and quotation requests.
To review PCB/PCBA requirements and provide engineering feedback, DFM review, BOM review, component sourcing, manufacturing assessment, pricing, lead-time estimates, and technical support.
To provide PCB manufacturing, PCB assembly, component sourcing, testing, quality control, packaging, delivery, and after-sales services.
To communicate with you about quotations, orders, technical confirmations, production status, shipment, invoices, quality issues, complaints, and customer service.
To manage our customer relationships and maintain business records.
To improve our website, products, services, quality processes, customer support, and user experience.
To protect the security and integrity of our website, IT systems, business operations, files, and communications.
To send service-related messages and, where permitted by law or with your consent, marketing communications about our products, capabilities, and services.
To comply with legal, tax, accounting, customs, regulatory, audit, dispute resolution, and contractual obligations.
4. Legal Bases for Processing under GDPR and UK GDPR
Where the GDPR or UK GDPR applies, we rely on the following legal bases:
Contract or steps before entering into a contract. We process your information to respond to quotation requests, review project requirements, provide services, process orders, and communicate with you about your project.
Legitimate interests. We process information to operate and improve our business, provide customer support, protect our systems, prevent fraud, maintain business records, manage supplier relationships, and develop our services, provided that our interests are not overridden by your rights and freedoms.
Consent. We rely on consent where required, including for certain non-essential cookies, analytics, marketing cookies, and certain marketing communications.
Legal obligation. We process information when necessary to comply with applicable laws, regulations, tax requirements, customs obligations, accounting rules, court orders, or lawful government requests.
5. Technical Files and Confidential Project Information
PCB and PCBA projects may include design files, BOM files, drawings, product specifications, technical requirements, and other business-sensitive information. We treat these materials as confidential project information.
We use project files only as necessary to review your inquiry, prepare quotations, provide engineering feedback, manufacture or assemble products, source components, perform testing and quality control, deliver orders, provide after-sales support, and maintain appropriate business and quality records.
We do not sell your project files. We do not use your design files for unrelated projects. Access to project files is limited to personnel, contractors, suppliers, and service providers who need the information for the purposes described in this Privacy Policy or in our agreement with you.
If your project requires a separate non-disclosure agreement, please contact us before submitting sensitive technical files.
6. Cookies and Similar Technologies
Our website uses cookies and similar technologies to operate the website, remember preferences, analyze website performance, and support marketing activities.
We may use the following types of cookies:
Strictly necessary or functional cookies. These are required for basic website functions, security, form submission, communication preferences, and services you request.
Preference cookies. These help remember language, region, or other website preferences.
Statistics or analytics cookies. These help us understand how visitors use our website so that we can improve our content, navigation, and services.
Marketing cookies. These may be used to create user profiles, measure advertising performance, or show more relevant content across websites.
Where required by law, we will ask for your consent before placing non-essential cookies. You can manage or withdraw cookie consent through our cookie preference tool or by adjusting your browser settings. Disabling certain cookies may affect some website features.
7. How We Share Information
We do not sell personal information for money. We may disclose information to the following categories of recipients when necessary for the purposes described in this Privacy Policy:
Our internal teams, including sales, engineering, purchasing, production, quality control, logistics, finance, and customer support.
Manufacturing, supply chain, and technical partners, including component suppliers, subcontract manufacturers, testing providers, engineering support providers, and logistics providers.
Website, IT, hosting, cloud storage, CRM, email, analytics, security, and communication service providers.
Payment, banking, accounting, tax, audit, legal, insurance, and professional advisers.
Shipping, customs, freight, and delivery partners.
Government authorities, regulators, courts, law enforcement, or other parties where disclosure is required or permitted by law.
Potential buyers, investors, advisers, or successors in connection with a business transaction, merger, acquisition, restructuring, financing, or transfer of assets.
We require service providers and partners to process information only for authorized purposes and to apply appropriate confidentiality and security measures.
8. International Transfers
We are based in China and serve customers worldwide. Your personal information and project files may be transferred to, stored in, or processed in China and other countries where we, our service providers, suppliers, or partners operate.
Where GDPR, UK GDPR, or similar international transfer rules apply, we will use appropriate safeguards where required, such as standard contractual clauses, the UK International Data Transfer Agreement or UK Addendum, transfer risk assessments, contractual confidentiality obligations, and technical and organizational security measures.
You may contact us to request more information about the safeguards used for international transfers.
9. Data Retention
We keep personal information only for as long as necessary for the purposes described in this Privacy Policy, unless a longer retention period is required or permitted by law.
Retention periods depend on the type of information, the nature of the project, customer relationship, legal requirements, quality control needs, warranty or after-sales support, tax and accounting obligations, dispute resolution needs, and legitimate business purposes.
In general, inquiry and communication records are kept for as long as needed to manage customer relationships and respond to future requests. Project files and order records may be kept as needed for manufacturing, quality traceability, technical support, warranty, repeat orders, legal compliance, or dispute handling.
When information is no longer needed, we will delete, anonymize, or securely archive it in accordance with our data retention practices.
10. Security
We use reasonable technical and organizational measures to protect personal information and project files against unauthorized access, loss, misuse, disclosure, alteration, and destruction. These measures may include access controls, confidentiality obligations, secure file management, backup procedures, system monitoring, and internal security processes.
However, no method of transmission over the Internet or electronic storage is completely secure. If you need to send highly confidential technical files, please contact us in advance to arrange an appropriate transfer method or confidentiality arrangement.
11. Your Rights under GDPR and UK GDPR
If GDPR or UK GDPR applies to you, you may have the following rights, subject to legal limits and exceptions:
The right to access your personal information.
The right to correct inaccurate or incomplete information.
The right to request deletion of your personal information.
The right to restrict processing.
The right to object to processing, including processing based on legitimate interests and direct marketing.
The right to data portability.
The right to withdraw consent at any time, where processing is based on consent.
The right not to be subject to certain decisions based solely on automated processing, including profiling, where such decisions produce legal or similarly significant effects.
The right to lodge a complaint with a data protection supervisory authority.
To exercise your rights, please contact us at info@toplinecircuit.com. We may need to verify your identity before responding to your request.
12. California Privacy Notice
This section applies to California residents where the California Consumer Privacy Act, as amended by the California Privacy Rights Act, applies to us.
In the past 12 months, we may have collected the following categories of personal information:
Identifiers, such as name, email address, phone number, company name, online identifiers, and IP address.
Commercial information, such as quotation requests, order records, products or services requested, project requirements, invoices, and customer service records.
Internet or electronic network activity information, such as browsing activity, pages viewed, cookie identifiers, and interactions with our website.
Professional or employment-related information, such as company name, job title, department, business contact details, and business role.
Geolocation information, limited to approximate location inferred from IP address.
Audio, electronic, or similar information, such as communications you send to us by email, website form, or messaging tools.
Inferences, such as preferences or interests inferred from your inquiries, website activity, or communications.
We collect this information from you directly, from your company or colleagues, from website technologies, from communication tools, from service providers, and from business partners involved in your project.
We use this information for the business and commercial purposes described in Sections 3 and 6 of this Privacy Policy.
We may disclose personal information to service providers, contractors, suppliers, logistics providers, IT providers, payment and accounting providers, professional advisers, and government authorities as described in Section 7.
We do not knowingly sell personal information for money. However, if our use of marketing, analytics, or advertising cookies is considered a “sale” or “sharing” under California law, you may opt out through our cookie preference tool, a “Do Not Sell or Share My Personal Information” link where available, or by contacting us at info@toplinecircuit.com.
We do not knowingly collect, sell, or share personal information of individuals under 16 years of age.
Subject to applicable law, California residents may have the right to know what personal information we collect, use, disclose, sell, or share; the right to access personal information; the right to delete personal information; the right to correct inaccurate personal information; the right to opt out of sale or sharing; the right to limit use and disclosure of sensitive personal information where applicable; and the right not to be discriminated against for exercising privacy rights.
To submit a California privacy request, please contact us at info@toplinecircuit.com. You may also use an authorized agent to submit a request on your behalf. We may need to verify your identity and the agent’s authority before responding.
13. Marketing Communications
Where permitted by law, we may send you information about our products, manufacturing capabilities, PCB/PCBA services, quotations, industry updates, or promotional content.
You may opt out of marketing communications at any time by contacting us at info@toplinecircuit.com or by using the unsubscribe method provided in the communication, where available. We may still send service-related communications about quotations, orders, technical confirmations, legal notices, or customer support.
14. Third-Party Links
Our website may contain links to third-party websites, platforms, plugins, or services. We are not responsible for the privacy practices, content, or security of third-party websites. We encourage you to read their privacy policies before providing personal information to them.
15. Children’s Privacy
Our website, products, and services are intended for business customers, engineers, procurement teams, and professional users. They are not directed to children. We do not knowingly collect personal information from children. If you believe a child has provided personal information to us, please contact us and we will take appropriate steps to delete the information.
16. Changes to This Privacy Policy
We may update this Privacy Policy from time to time to reflect changes in our website, services, legal requirements, or business practices. The updated version will be posted on this page with a revised “Last updated” date.
17. Contact Us
If you have any questions, requests, or complaints about this Privacy Policy or how we handle personal information, please contact us:
Shenzhen Topline Technology Co., LTD
Email: info@toplinecircuit.com
Phone / WhatsApp / WeChat: +86 13425156463
Website: www.toplinecircuit.com
Address: The 3rd Floor, Building B3, Yanchuan North Industry Park, Yanluo Street, Bao’an District, Shenzhen, China