Legal
Cookie Notice
Last updated: 15 October 2026
This site uses a small number of cookies. There are no advertising, retargeting or social-media tracking cookies on it, and no third-party ad network is loaded on any page. What you see below is the complete set we are aware of.
| Cookie | Set by | Purpose | Duration | Category |
|---|---|---|---|---|
| __cf_bm | Cloudflare | Bot management and security — distinguishes human visitors from automated traffic. | 30 minutes | Essential |
| cf_clearance | Cloudflare | Set only when a security challenge is served, to confirm it was passed. Not set for every visitor. | Up to 1 year | Essential |
| _ga | Google Analytics 4 | Distinguishes one visitor from another so traffic can be counted without identifying you. | 2 years | Analytics |
| _ga_DXQPR2ECKM | Google Analytics 4 | Keeps session state for the same visitor across pages. | 2 years | Analytics |
Your choices
Essential cookies are needed for the site to work and to stay protected, so they cannot be switched off from here. Analytics cookies can be refused or removed in your browser settings — blocking cookies for this site does not stop you from contacting us, since our forms work without them. Google also publishes a browser opt-out add-on for its analytics.
Clearing cookies in your browser deletes those already stored; a fresh visit will then set them again unless they are blocked.
What we do not do
We do not load advertising or retargeting pixels, we do not build advertising profiles, and we do not sell analytics data. The activity that reaches us is aggregate traffic and enquiry data, which is described in our Privacy Policy.
Questions about this page, or a request relating to your own data or documents, can go to qishengnan523@gmail.com.