Privacy Policy

Last updated: August 1, 2026

This Privacy Policy explains how PureAirGuide (“we”, “us”, or “our”)
collects, uses, and shares information about you when you visit our website at
https://www.hmwzl.cn (the “Site”).

1. Information We Collect

a. Information You Provide

Contact details — if you email us, we keep your email address and any content you send so we can reply.
Comments — if our comments feature is enabled, your name, email, and comment text are stored until we approve or trash it.
Newsletter — if you sign up, we keep your email until you unsubscribe via the one-click link in every email.

b. Information Collected Automatically

Log data: IP address, browser type, referring site, page visited, time and date.
Cookies and similar technologies — see Section 4 below.
Analytics data via Google Analytics 4 (IP anonymized).

2. How We Use the Information

To operate, maintain, and improve our Site and content.
To reply to your emails, submissions, questions and comments.
To send editorial content if you have explicitly opted into the newsletter.
To understand which pages and articles are the most useful to readers (GA4 analytics).
To comply with legal obligations, including FTC and GDPR/CCPA disclosure rules.

3. How We Share Information

We do not sell, rent, or trade your personal information.

We share data only in the following, limited cases:

With service providers operating on our behalf (Google Analytics, our email newsletter provider, our web host), strictly under contract and bound by privacy laws.
When required by law, subpoena, or to protect the safety, rights, or property of PureAirGuide, our staff, or the public.
In the event of a merger, acquisition, or asset sale — any new owner will be bound by this policy.

4. Cookies & Tracking Technologies

We use a small number of cookies. You can block cookies in your browser settings,
but some Site features may not function properly.

Essential cookies: session cookies for login state, preferences, anti-spam (if comments active).
Analytics cookies: Google Analytics 4 cookies with IP anonymization enabled.
Affiliate cookies: when you click a link to Amazon or another retailer, that retailer may set its own cookie under its own privacy policy. We have no control over these third-party cookies.

5. Affiliate Advertising Disclosure

PureAirGuide is a participant in the Amazon Services LLC Associates Program, an
affiliate advertising program. When you click links to Amazon products on our site,
Amazon may set cookies and recognize that you came from us. If you make a qualifying
purchase, we receive a commission from Amazon, at no extra cost to you.

This affiliate relationship never influences editorial rankings, ratings, or
product selection. We write every review the same way whether or not an affiliate link exists.

6. Your Rights (GDPR, CCPA & Global Visitors)

Regardless of where you live, you may exercise the following rights by writing to us at
editor@www.hmwzl.cn:

Access — request a copy of the personal information we hold about you.
Correction — ask us to correct inaccurate or incomplete data.
Deletion / right to be forgotten — ask us to delete your personal information (subject to legal exceptions).
Restriction & portability — ask us to restrict processing or export your data.
Objection & opt-out — opt out of marketing emails at any time (unsubscribe link in each email) or object to processing based on legitimate interests.

California residents: under the CCPA you have the additional right to opt out of
any “sale” of personal data. As stated in Section 3, we do not sell your data.

7. Children’s Privacy

Our Site is not directed to children under the age of 13. We do not knowingly collect
personal information from children. If you believe a child has submitted personal
information to us, please contact us at editor@www.hmwzl.cn and we will promptly delete it.

8. Data Retention

Contact emails: 24 months from last response.
Newsletter subscribers: until unsubscribe request is received.
Analytics data: 14 months (configured in Google Analytics).
Legal / tax records: as required by applicable law.

9. International Transfers

We operate from the United States. If you access the Site from outside the U.S., please
understand your information may be transferred to, stored, and processed in the U.S.,
which may have different data-protection laws than your jurisdiction. We rely on
recognized transfer mechanisms including Standard Contractual Clauses where applicable.

10. Changes to This Policy

We may update this Privacy Policy periodically. If we make material changes, we will
post the new version on this page with a revised “Last updated” date and, where
appropriate, notify you by email or a prominent notice on the Site.

11. How to Contact Us

If you have any questions, concerns, or complaints about this Privacy Policy,
email our data protection point of contact at
editor@www.hmwzl.cn.